{"title":"IVD‑READY Gold Nanoparticles for Biosensing","description":"\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\n\u003cstrong\u003e\u003c\/strong\u003e                                                                               \u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eNanoBrand \u003cstrong\u003eIVD‑READY Gold Nanoparticles\u003c\/strong\u003e are engineered for high‑performance in-vitro diagnostics (IVD), providing sensitive and reliable detection of biomolecules across multiple assay formats. This collection is optimized for developers of lateral flow assays (LFAs), ELISA, microfluidics, and advanced biosensor platforms who require consistent optical performance, robust bioconjugation, and regulatory‑ready documentation.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eWhat “IVD‑READY” means\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e“IVD‑READY” designates NanoBrand Gold Nanoparticles that meet stringent criteria for use in in-vitro diagnostic assays. This includes strict monodispersity (low CoV and PdI), well‑defined size and spherical morphology, reactant‑free formulations, and precisely controlled surface chemistries to support stable, reproducible conjugation to antibodies, proteins, and nucleic acids.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eEach IVD‑READY lot is supplied with a detailed Certificate of Analysis (CoA) including lot-specific TEM images, size distribution, UV‑Vis spectra, hydrodynamic diameter, zeta potential, and key QC metrics. This level of characterization simplifies method validation, lot qualification, and documentation from feasibility through verification, validation, and scale‑up.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cb\u003eWhy Monodispersity and Purity Matter\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eHigh‑quality IVD biosensing depends on nanoparticle consistency. Monodisperse gold nanoparticles deliver uniform optical response and predictable surface behavior, enabling consistent signal intensity, improved sensitivity, and reliable quantitative analysis. High purity minimizes background interference and non‑specific binding, enhancing specificity and reducing assay noise.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eTogether, these properties are essential for developing reproducible, scalable, and regulatory‑ready diagnostic systems based on gold nanoparticle biosensors.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cb\u003eEngineered for Diagnostic Applications\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eNanoBrand IVD‑READY Gold Nanoparticles feature controlled size distribution, spherical morphology, and clean surfaces for efficient bioconjugation and stable integration into a wide range of IVD formats, including:\u003c\/p\u003e\n\u003cul style=\"margin-top: 0cm;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"text-align: justify; mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003eLateral flow assays (LFAs) and rapid diagnostic tests\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"text-align: justify; mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003eELISA and colorimetric immunoassays\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"text-align: justify; mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003eMicrofluidic and lab‑on‑chip systems\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"text-align: justify; mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003eImmunoassays and protein detection\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"text-align: justify; mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003eMolecular diagnostics and nucleic acid detection\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"text-align: justify; mso-list: l1 level1 lfo1; tab-stops: list 36.0pt;\"\u003eOptical and plasmonic biosensor platforms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eAvailable in commonly used sizes and optical densities (OD 20 and OD 50), this collection offers flexibility for both research‑grade assay development and transition to commercial diagnostic manufacturing.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cb\u003eSurface Options for Flexible Conjugation\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eTo support diverse IVD biosensing strategies, IVD‑READY gold nanoparticles are offered with tailored surface chemistries:\u003c\/p\u003e\n\u003cul style=\"margin-top: 0cm;\" type=\"disc\"\u003e\n\u003cli class=\"MsoNormal\" style=\"text-align: justify; mso-list: l0 level1 lfo2; tab-stops: list 36.0pt;\"\u003e\n\u003cstrong\u003eCitrate‑coated\u003c\/strong\u003e gold nanoparticles for rapid, passive adsorption–based conjugation, ideal for screening and early‑stage assay optimization.\u003c\/li\u003e\n\u003cli class=\"MsoNormal\" style=\"text-align: justify; mso-list: l0 level1 lfo2; tab-stops: list 36.0pt;\"\u003e\n\u003cstrong\u003ePEG5000‑carboxylate\u003c\/strong\u003e gold nanoparticles for covalent coupling of amine‑containing biomolecules (e.g., antibodies, proteins, oligonucleotides), improving targeting specificity, stability, and performance in complex matrices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThese surface options enable seamless integration into diagnostic workflows while maintaining colloidal stability, low background, and lot‑to‑lot reproducibility. Customized surface coatings are available \u003cspan style=\"color: rgb(42, 14, 170);\"\u003e\u003ca rel=\"noopener\" title=\"NanoBrand contact form\" href=\"https:\/\/www.nanobrand.com\/pages\/contact\" style=\"color: rgb(42, 14, 170);\" target=\"_blank\"\u003eon request\u003c\/a\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cb\u003e \u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\"\u003e\n\u003cb\u003eAvailable IVD‑READY Gold Nanoparticle Products\u003c\/b\u003e\u003cstrong\u003e\u003c\/strong\u003e\n\u003c\/h2\u003e","products":[{"product_id":"100-nm-ivd-ready-gold-nanoparticles-for-biosensing","title":"100 nm IVD‑READY Gold Nanoparticles for Biosensing","description":"\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eNanoBrand \u003cstrong\u003e100 nm IVD‑READY Gold Nanoparticles\u003c\/strong\u003e are \u003cb\u003eoptimized\u003c\/b\u003e for high‑signal IVD assays that require clear, easily interpretable visual readouts. Their large core size delivers intense plasmonic color and a strong optical response, making them ideal for visually read lateral flow assays (LFAs), colorimetric IVD tests, and instrumented biosensing platforms where line clarity, contrast, and sensitivity are critical for diagnostic accuracy and user confidence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Application focus\u003c\/strong\u003e: IVD biosensing, rapid tests, ELISA, microfluidics, biosensors, LFAs\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Format:\u003c\/strong\u003e Aqueous colloidal suspension, ready for bioconjugation\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Grade:\u003c\/strong\u003e Research and development, suitable for transition to commercial IVD use\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 id=\"high-monodispersity-for-reliable-diagnostics\" class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\"\u003e\u003cstrong\u003eHigh monodispersity for reliable diagnostics\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eCore diameter: \u003c\/strong\u003e100 nm, narrow size distribution\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCoV (coefficient of variation): \u003c\/strong\u003e≤ 5%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePolydispersity index: \u003c\/strong\u003ePdI ≤ 0.1\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eTightly controlled monodispersity\u003c\/strong\u003e ensures uniform localized surface plasmon resonance (LSPR), generating a strong, consistent red signal and predictable optical response in IVD biosensing assays. This uniformity improves \u003cstrong\u003elot‑to‑lot reproducibility\u003c\/strong\u003e and provides more reliable limits of detection than polydisperse gold nanoparticle colloids. The narrow size distribution and clean, reactant‑free surface chemistry support \u003cstrong\u003erobust antibody and biomolecule conjugation\u003c\/strong\u003e, enabling sensitive, reproducible detection of proteins, antibodies, and nucleic acids in clinical diagnostics and research applications. \u003cspan\u003eExplore more about the \u003cspan style=\"color: rgb(17, 25, 182);\"\u003e\u003cem\u003e\u003ca rel=\"noopener\" style=\"color: rgb(17, 25, 182);\" title=\"Benefits of monodisperse gold nanoparticles for LFAs.\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/monodispersity-and-purity-advantages-for-biosensing\" target=\"_blank\"\u003eBenefits of monodisperse Gold Nanoparticles for LFAs\u003c\/a\u003e\u003c\/em\u003e\u003c\/span\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eClean surface and reactant‑free matrix\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eMorphology:\u003c\/strong\u003e spherical gold nanoparticles, no other shapes. \u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eMatrix:\u003c\/strong\u003e reactant‑free aqueous colloidal suspension, low ionic strength.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThe \u003cstrong\u003ereactant‑free\u003c\/strong\u003e and \u003cstrong\u003estabilizer-free\u003c\/strong\u003e formulation minimizes interference with surface functionalization and reduces aggregation risk, helping maintain colloidal stability, signal intensity, and assay robustness over time. Find out\u003cem\u003e \u003cspan style=\"color: rgb(46, 23, 151);\"\u003e\u003ca rel=\"noopener\" title=\"Gold Nanoparticles in Pure Water for Reliable Surface Coating NanoBrand's synthesis advantage\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/why-stabilizing-agents-should-be-avoided-gold-nanoparticles\" style=\"color: rgb(46, 23, 151);\" target=\"_blank\"\u003eWhy should Stabilizing agents be Avoided.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eSurface options for flexible conjugation\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e- Citrate:\u003c\/b\u003e for passive adsorption of antibodies and proteins, ideal for rapid screening and conjugation optimization.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e- PEG5000‑carboxylate (thiol‑PEG‑COOH):\u003c\/b\u003e for covalent EDC\/NHS coupling to amine‑containing biomolecules, with reduced non‑specific binding and enhanced stability in complex matrices.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eThis flexibility lets align your conjugation strategy with assay format, stability requirements, and IVD regulatory needs. Find out \u003cspan style=\"color: rgb(30, 18, 155);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/surface-chemistry-as-the-real-product-when-you-buy-gold-nanoparticles\" title=\"The role of Gold Nanoparticles surface chemistry for various applications\" style=\"color: rgb(30, 18, 155);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eWhy is Surface Chemistry a \"real product\" for Gold Nanoparticles.\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eOptimized OD for biosensing\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eOptical density options: \u003c\/strong\u003eOD 20 and OD 50. These concentrations are tuned for robust conjugation performance and reliable signal generation in common biosensing formats. \u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eIVD‑oriented quality control and CoA\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eEach lot includes a detailed CoA with \u003cstrong\u003elot‑specific\u003c\/strong\u003e TEM images, size distribution, UV‑Vis spectra, hydrodynamic diameter, PdI, zeta potential, and key QC parameters, supporting internal QC, method validation, and regulatory submissions for IVD and medical diagnostic products.\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cspan style=\"color: rgb(49, 23, 166);\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eConsult a typical \u003c\/span\u003e\u003cspan style=\"color: rgb(34, 15, 118);\"\u003e\u003cem\u003e\u003ca rel=\"noopener\" title=\"CoA example for 100 nm Gold Nanoparticles with PEG-carboxyl surface OD=50 IVD-READY\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_100nm_IVD-READY_Gold_Nano-Spheres_OD_50_PEG5000-carboxyl.pdf?v=1780512960\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(44, 20, 153);\"\u003eCoA for 100nm Gold Nano-Spheres, PEG5K-CARB, OD=50\u003c\/span\u003e\u003c\/a\u003e and \u003ca rel=\"noopener\" title=\"CoA example for 100 nm Gold nanoparticles with Citrate surface OD=20 IVD-READY\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_100nm_IVD-READY_Gold_Nano-Spheres_OD_20_citrate.pdf?v=1780512944\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(35, 13, 135);\"\u003eCoA for 100nm Gold Nano-Spheres, Citrate, OD=20\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eWhen to choose 100 nm\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eThe \u003cstrong\u003e100 nm IVD‑READY Gold Nanoparticles\u003c\/strong\u003e format is ideal for in vitro diagnostic assays that require maximum signal strength and clear line visibility at the test or capture zone. It is particularly suited for low‑abundance analytes, point‑of‑care tests for untrained users, and as a high‑signal reference during lateral flow assay (LFA) and IVD biosensor optimization and scale‑up. \u003cstrong\u003eChoose 100 nm IVD‑READY Gold Nanoparticles\u003c\/strong\u003e when you need maximum visual contrast on test and control lines and high signal per binding event at low analyte concentrations, using this size as a high‑signal benchmark against smaller diameters. Learn more about \u003cspan style=\"color: rgb(17, 24, 151);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/pages\/gold-nanoparticles-smart-drug-delivery-for-modern-medicine\" title=\"Gold Nanoparticles in Biosensing and Personalized Medicine\" style=\"color: rgb(17, 24, 151);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eGold Nanoparticles in Biosensing and Personalized Medicine\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eCustomization and OEM Options\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eCustom diameters, optical densities, and PEG spacer lengths are available on request.\u003c\/strong\u003e \u003cspan style=\"color: rgb(15, 21, 149);\"\u003e\u003ca style=\"color: rgb(15, 21, 149);\" href=\"https:\/\/www.nanobrand.com\/pages\/contact\" title=\"NanoBrand contact for customization of Gold Nanoparticles\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eContact us\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e to discuss your specific requirements.\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eStorage and Stability\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e- Citrate‑coated: \u003c\/strong\u003estore at 4–25 °C, do not freeze. Gently shake before use.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e- PEG‑COOH:\u003c\/strong\u003e store at 2–8 °C, do not freeze. Gently shake before use.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cspan\u003eRecommended storage conditions are indicated on the CoA. \u003c\/span\u003eUnder these conditions, products are typically stable for at least 12 months. For long‑term storage, check UV‑Vis spectra periodically to confirm colloidal and optical stability.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eSafety and Handling\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eNanoBrand does not guarantee the suitability of its products for any particular application. It is the customer’s responsibility to ensure that the product is appropriate and permitted for the intended use, in accordance with applicable regulations and internal quality systems. Please consult our\u003ci\u003e \u003cspan style=\"color: rgb(21, 28, 162);\"\u003e\u003ca style=\"color: rgb(21, 28, 162);\" title=\"NanoBrand Terms of Service\" href=\"https:\/\/www.nanobrand.com\/policies\/terms-of-service\" target=\"_blank\"\u003eTerms of Service\u003c\/a\u003e\u003c\/span\u003e\u003c\/i\u003e and follow institutional guidelines for the safe handling and disposal of nanomaterials.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eBrowse more sizes in \u003cem\u003e\u003cspan style=\"color: rgb(19, 19, 154);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-ivd-ready-series\" title=\"IVD-READY Gold Nanoparticles collection\" style=\"color: rgb(19, 19, 154);\" rel=\"noopener\" target=\"_blank\"\u003eIVD-READY Collection\u003c\/a\u003e\u003c\/span\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eDiscover\u003cem\u003e \u003cspan style=\"color: rgb(45, 22, 146);\"\u003e\u003ca title=\"Gold Nanoparticles - Spherical, Citrate Surface\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-citrate-surface\" rel=\"noopener\" style=\"color: rgb(45, 22, 146);\" target=\"_blank\"\u003eGold Nanoparticles - Spherical, Citrate Surface\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003cspan style=\"color: rgb(33, 15, 149);\"\u003e\u003cem\u003e \u003c\/em\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eand\u003c\/span\u003e\u003cem\u003e \u003cspan style=\"color: rgb(34, 15, 153);\"\u003e\u003ca title=\"Gold Nanostars\" rel=\"noopener\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanostars\" style=\"color: rgb(34, 15, 153);\" target=\"_blank\"\u003eGold Nanostars.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\" lang=\"EN-CA\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/all_particles_free_of_final.png?v=1753887881\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"NanoBrand","offers":[{"title":"PEG5000-COOH \/ 20 \/ 1 ml","offer_id":52450699739417,"sku":"NB-GSP-IVD-100-5CARB-20-1","price":242.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 2 ml","offer_id":52450699772185,"sku":"NB-GSP-IVD-100-5CARB-20-2","price":385.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 3 ml","offer_id":52450699804953,"sku":"NB-GSP-IVD-100-5CARB-20-3","price":510.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 5 ml","offer_id":52450699837721,"sku":"NB-GSP-IVD-100-5CARB-20-5","price":704.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 10 ml","offer_id":52450699870489,"sku":"NB-GSP-IVD-100-5CARB-20-10","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 20 ml","offer_id":52450699903257,"sku":"NB-GSP-IVD-100-5CARB-20-20","price":1880.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 30 ml","offer_id":52450699936025,"sku":"NB-GSP-IVD-100-5CARB-20-30","price":2310.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 0.5 ml","offer_id":52450699968793,"sku":"NB-GSP-IVD-100-5CARB-50-0.5","price":320.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 1 ml","offer_id":52450700001561,"sku":"NB-GSP-IVD-100-5CARB-50-1","price":605.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 2 ml","offer_id":52450700034329,"sku":"NB-GSP-IVD-100-5CARB-50-2","price":960.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 3 ml","offer_id":52450700067097,"sku":"NB-GSP-IVD-100-5CARB-50-3","price":1230.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 5 ml","offer_id":52450700099865,"sku":"NB-GSP-IVD-100-5CARB-50-5","price":1770.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 10 ml","offer_id":52450700132633,"sku":"NB-GSP-IVD-100-5CARB-50-10","price":2990.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 1 ml","offer_id":52450700165401,"sku":"NB-GSP-IVD-100-CIT-20-1","price":231.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 2 ml","offer_id":52450700198169,"sku":"NB-GSP-IVD-100-CIT-20-2","price":368.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 5 ml","offer_id":52450700230937,"sku":"NB-GSP-IVD-100-CIT-20-5","price":672.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 10 ml","offer_id":52450700263705,"sku":"NB-GSP-IVD-100-CIT-20-10","price":1145.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 20 ml","offer_id":52450700296473,"sku":"NB-GSP-IVD-100-CIT-20-20","price":1794.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 30 ml","offer_id":52450700329241,"sku":"NB-GSP-IVD-100-CIT-20-30","price":2205.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 60 ml","offer_id":52450700362009,"sku":"NB-GSP-IVD-100-CIT-20-60","price":3581.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/100nm-PEG-gold-nanoparticles-tem-closeup.png?v=1777481491"},{"product_id":"80-nm-ivd-ready-gold-nanoparticles-for-biosensing","title":"80 nm IVD‑READY Gold Nanoparticles for Biosensing","description":"\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eNanoBrand \u003cstrong\u003e80 nm IVD‑READY Gold Nanoparticles\u003c\/strong\u003e are \u003cstrong\u003eoptimized\u003c\/strong\u003e for high‑signal IVD assays that require strong signal and precise visual readouts. Their 80 nm core size provides intense plasmonic color with excellent flow and line definition, making them ideal for visually read LFAs, colorimetric IVD tests, and instrumented biosensing platforms where line clarity, contrast, and sensitivity are critical for diagnostic accuracy and user confidence.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Application focus\u003c\/strong\u003e: IVD biosensing, rapid tests, ELISA, microfluidics, biosensors, LFAs\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Format:\u003c\/strong\u003e Aqueous colloidal suspension, ready for bioconjugation\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Grade:\u003c\/strong\u003e Research and development, suitable for transition to commercial IVD use\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 id=\"high-monodispersity-for-reliable-diagnostics\" class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\"\u003e\u003cstrong\u003eHigh monodispersity for reliable diagnostics\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eCore diameter: \u003c\/strong\u003e80 nm, narrow size distribution\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCoV (coefficient of variation): \u003c\/strong\u003e≤ 5%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePolydispersity index: \u003c\/strong\u003ePdI ≤ 0.1\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eTightly controlled monodispersity\u003c\/strong\u003e ensures uniform localized surface plasmon resonance (LSPR), generating a strong, consistent red signal and predictable optical response in IVD biosensing assays. This uniformity improves \u003cstrong\u003elot‑to‑lot reproducibility\u003c\/strong\u003e and provides more reliable limits of detection than polydisperse gold nanoparticle colloids. The narrow size distribution and clean, reactant‑free surface chemistry support \u003cstrong\u003erobust antibody and biomolecule conjugation\u003c\/strong\u003e, enabling sensitive, reproducible detection of proteins, antibodies, and nucleic acids in clinical diagnostics and research applications. \u003cspan\u003eExplore more about the \u003cspan style=\"color: rgb(17, 25, 182);\"\u003e\u003cem\u003e\u003ca rel=\"noopener\" style=\"color: rgb(17, 25, 182);\" title=\"Benefits of monodisperse gold nanoparticles for LFAs.\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/monodispersity-and-purity-advantages-for-biosensing\" target=\"_blank\"\u003eBenefits of monodisperse Gold Nanoparticles for LFAs\u003c\/a\u003e\u003c\/em\u003e\u003c\/span\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eClean surface and reactant‑free matrix\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eMorphology:\u003c\/strong\u003e spherical gold nanoparticles, no other shapes. \u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eMatrix:\u003c\/strong\u003e reactant‑free aqueous colloidal suspension, low ionic strength.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThe \u003cstrong\u003ereactant‑free\u003c\/strong\u003e and \u003cstrong\u003estabilizer-free\u003c\/strong\u003e formulation minimizes interference with surface functionalization and reduces aggregation risk, helping maintain colloidal stability, signal intensity, and assay robustness over time. Find out\u003cem\u003e \u003cspan style=\"color: rgb(46, 23, 151);\"\u003e\u003ca rel=\"noopener\" title=\"Gold Nanoparticles in Pure Water for Reliable Surface Coating NanoBrand's synthesis advantage\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/why-stabilizing-agents-should-be-avoided-gold-nanoparticles\" style=\"color: rgb(46, 23, 151);\" target=\"_blank\"\u003eWhy should Stabilizing agents be Avoided.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eSurface options for flexible conjugation\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e- Citrate:\u003c\/b\u003e for passive adsorption of antibodies and proteins, ideal for rapid screening and conjugation optimization.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e- PEG5000‑carboxylate (thiol‑PEG‑COOH):\u003c\/b\u003e for covalent EDC\/NHS coupling to amine‑containing biomolecules, with reduced non‑specific binding and enhanced stability in complex matrices.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eThis flexibility lets align your conjugation strategy with assay format, stability requirements, and IVD regulatory needs. Find out \u003cspan style=\"color: rgb(30, 18, 155);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/surface-chemistry-as-the-real-product-when-you-buy-gold-nanoparticles\" title=\"The role of Gold Nanoparticles surface chemistry for various applications\" style=\"color: rgb(30, 18, 155);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eWhy is Surface Chemistry a \"real product\" for Gold Nanoparticles.\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eOptimized OD for biosensing\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eOptical density options: \u003c\/strong\u003eOD 20 and OD 50. These concentrations are tuned for robust conjugation performance and reliable signal generation in common biosensing formats. \u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eIVD‑oriented quality control and CoA\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eEach lot includes a detailed CoA with \u003cstrong\u003elot‑specific\u003c\/strong\u003e TEM images, size distribution, UV‑Vis spectra, hydrodynamic diameter, PdI, zeta potential, and key QC parameters, supporting internal QC, method validation, and regulatory submissions for IVD and medical diagnostic products. \u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cspan style=\"color: rgb(49, 23, 166);\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eConsult a typical \u003c\/span\u003e\u003cspan style=\"color: rgb(34, 15, 118);\"\u003e\u003cem\u003e\u003ca rel=\"noopener\" title=\"CoA example for 80 nm Gold Nanoparticles with PEG-carboxyl surface OD=50 IVD-READY\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_80nm_IVD-READY_Gold_Nano-Spheres_OD_50_PEG5000-carboxyl.pdf?v=1780512960\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(44, 20, 153);\"\u003eCoA for 80nm Gold Nano-Spheres, PEG5K-CARB, OD=50\u003c\/span\u003e\u003c\/a\u003e and \u003ca rel=\"noopener\" title=\"CoA example for 80 nm Gold nanoparticles with Citrate surface OD=20 IVD-READY\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_80nm_IVD-READY_Gold_Nano-Spheres_OD_20_citrate.pdf?v=1780512944\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(35, 13, 135);\"\u003eCoA for 80nm Gold Nano-Spheres, Citrate, OD=20\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eWhen to choose 80 nm\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThe \u003cb\u003e80 nm IVD‑READY Gold Nanoparticle\u003c\/b\u003e format is ideal for IVD assays that need strong signal with excellent flow and sharp line definition at the test or capture zone. It is well suited for optimizing sensitivity and background in LFAs, ELISA‑type colorimetric tests, and IVD biosensors where capillary migration and line clarity are critical. \u003cb\u003eChoose 80 nm IVD‑READY Gold Nanoparticles\u003c\/b\u003e when you require high visual contrast on test and control lines and a balanced, high‑performance option for point‑of‑care and lab‑based IVD biosensing applications, often serving as a balanced “high‑performance” option against smaller and larger diameters during biosensing assay optimization. Learn more about \u003cspan style=\"color: rgb(17, 24, 151);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/pages\/gold-nanoparticles-smart-drug-delivery-for-modern-medicine\" title=\"Gold Nanoparticles in Biosensing and Personalized Medicine\" style=\"color: rgb(17, 24, 151);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eGold Nanoparticles in Biosensing and Personalized Medicine\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eCustomization and OEM Options\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eCustom diameters, optical densities, and PEG spacer lengths are available on request.\u003c\/strong\u003e \u003cspan style=\"color: rgb(15, 21, 149);\"\u003e\u003ca style=\"color: rgb(15, 21, 149);\" href=\"https:\/\/www.nanobrand.com\/pages\/contact\" title=\"NanoBrand contact for customization of Gold Nanoparticles\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eContact us\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e to discuss your specific requirements.\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eStorage and Stability\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e- Citrate‑coated: \u003c\/strong\u003estore at 4–25 °C, do not freeze. Gently shake before use.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e- PEG‑COOH:\u003c\/strong\u003e store at 2–8 °C, do not freeze. Gently shake before use.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eUnder these conditions, products are typically stable for at least 12 months. For long‑term storage, check UV‑Vis spectra periodically to confirm colloidal and optical stability.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eSafety and Handling\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eNanoBrand does not guarantee the suitability of its products for any particular application. It is the customer’s responsibility to ensure that the product is appropriate and permitted for the intended use, in accordance with applicable regulations and internal quality systems. Please consult our\u003ci\u003e \u003cspan style=\"color: rgb(21, 28, 162);\"\u003e\u003ca style=\"color: rgb(21, 28, 162);\" title=\"NanoBrand Terms of Service\" href=\"https:\/\/www.nanobrand.com\/policies\/terms-of-service\" target=\"_blank\"\u003eTerms of Service\u003c\/a\u003e\u003c\/span\u003e\u003c\/i\u003e and follow institutional guidelines for the safe handling and disposal of nanomaterials.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eBrowse more sizes in \u003cem\u003e\u003cspan style=\"color: rgb(37, 20, 148);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-ivd-ready-series\" title=\"IVD-READY Gold nanoparticles collection\" rel=\"noopener\" style=\"color: rgb(37, 20, 148);\" target=\"_blank\"\u003eIVD-READY Collection\u003c\/a\u003e\u003c\/span\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eDiscover\u003cem\u003e \u003cspan style=\"color: rgb(45, 22, 146);\"\u003e\u003ca title=\"Gold Nanoparticles - Spherical, Citrate Surface\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-citrate-surface\" rel=\"noopener\" style=\"color: rgb(45, 22, 146);\" target=\"_blank\"\u003eGold Nanoparticles - Spherical, Citrate Surface\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003cspan style=\"color: rgb(33, 15, 149);\"\u003e\u003cem\u003e \u003c\/em\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eand\u003c\/span\u003e\u003cem\u003e \u003cspan style=\"color: rgb(34, 15, 153);\"\u003e\u003ca title=\"Gold Nanostars\" rel=\"noopener\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanostars\" style=\"color: rgb(34, 15, 153);\" target=\"_blank\"\u003eGold Nanostars.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\" lang=\"EN-CA\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/all_particles_free_of_final.png?v=1753887881\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"NanoBrand","offers":[{"title":"PEG5000-COOH \/ 20 \/ 1 ml","offer_id":52463175893273,"sku":"NB-GSP-IVD-100-5CARB-20-1","price":242.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 2 ml","offer_id":52463175926041,"sku":"NB-GSP-IVD-100-5CARB-20-2","price":385.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 3 ml","offer_id":52463175958809,"sku":"NB-GSP-IVD-100-5CARB-20-3","price":510.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 5 ml","offer_id":52463175991577,"sku":"NB-GSP-IVD-100-5CARB-20-5","price":704.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 10 ml","offer_id":52463176024345,"sku":"NB-GSP-IVD-100-5CARB-20-10","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 20 ml","offer_id":52463176057113,"sku":"NB-GSP-IVD-100-5CARB-20-20","price":1880.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 30 ml","offer_id":52463176089881,"sku":"NB-GSP-IVD-100-5CARB-20-30","price":2310.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 0.5 ml","offer_id":52463176122649,"sku":"NB-GSP-IVD-100-5CARB-50-0.5","price":320.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 1 ml","offer_id":52463176155417,"sku":"NB-GSP-IVD-100-5CARB-50-1","price":605.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 2 ml","offer_id":52463176188185,"sku":"NB-GSP-IVD-100-5CARB-50-2","price":960.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 3 ml","offer_id":52463176220953,"sku":"NB-GSP-IVD-100-5CARB-50-3","price":1230.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 5 ml","offer_id":52463176253721,"sku":"NB-GSP-IVD-100-5CARB-50-5","price":1770.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 10 ml","offer_id":52463176286489,"sku":"NB-GSP-IVD-100-5CARB-50-10","price":2990.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 1 ml","offer_id":52463176319257,"sku":"NB-GSP-IVD-100-CIT-20-1","price":231.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 2 ml","offer_id":52463176352025,"sku":"NB-GSP-IVD-100-CIT-20-2","price":368.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 5 ml","offer_id":52463176384793,"sku":"NB-GSP-IVD-100-CIT-20-5","price":672.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 10 ml","offer_id":52463176417561,"sku":"NB-GSP-IVD-100-CIT-20-10","price":1145.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 20 ml","offer_id":52463176450329,"sku":"NB-GSP-IVD-100-CIT-20-20","price":1794.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 30 ml","offer_id":52463176483097,"sku":"NB-GSP-IVD-100-CIT-20-30","price":2205.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 60 ml","offer_id":52463176515865,"sku":"NB-GSP-IVD-100-CIT-20-60","price":3581.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/80nm-PEG-gold-nanoparticles-tem-closeup.png?v=1777481099"},{"product_id":"40-nm-ivd-ready-gold-nanoparticles-for-biosensing","title":"40 nm IVD‑READY Gold Nanoparticles for Biosensing","description":"\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eNanoBrand \u003cb\u003e40 nm IVD‑READY Gold Nanoparticles\u003c\/b\u003e are \u003cb\u003eoptimized\u003c\/b\u003e for IVD assays that require precise quantitative readouts and excellent conjugation control. Their 40 nm core size provides well‑defined plasmonic color with outstanding stability and low background, making them ideal for high‑sensitivity LFAs, multiplexed colorimetric IVD tests, and instrumented biosensing platforms where analytical performance, specificity, and reproducibility are critical for diagnostic accuracy and regulatory‑ready validation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Application focus\u003c\/strong\u003e: IVD biosensing, rapid tests, ELISA, microfluidics, biosensors, LFAs\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Format:\u003c\/strong\u003e Aqueous colloidal suspension, ready for bioconjugation\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Grade:\u003c\/strong\u003e Research and development, suitable for transition to commercial IVD use\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 id=\"high-monodispersity-for-reliable-diagnostics\" class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\"\u003e\u003cstrong\u003eHigh monodispersity for reliable diagnostics\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eCore diameter: \u003c\/strong\u003e40 nm, narrow size distribution\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCoV (coefficient of variation): \u003c\/strong\u003e≤ 5%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePolydispersity index: \u003c\/strong\u003ePdI ≤ 0.1\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eTightly controlled monodispersity\u003c\/strong\u003e ensures uniform localized surface plasmon resonance, generating a strong, consistent red signal and predictable optical response in IVD biosensing assays. This uniformity improves \u003cstrong\u003elot‑to‑lot reproducibility\u003c\/strong\u003e and provides more reliable limits of detection than polydisperse gold nanoparticle colloids. The narrow size distribution and clean, reactant‑free surface chemistry support \u003cstrong\u003erobust antibody and biomolecule conjugation\u003c\/strong\u003e, enabling sensitive, reproducible detection of proteins, antibodies, and nucleic acids in clinical diagnostics and research applications. \u003cspan\u003eExplore more about the \u003cspan style=\"color: rgb(17, 25, 182);\"\u003e\u003cem\u003e\u003ca rel=\"noopener\" style=\"color: rgb(17, 25, 182);\" title=\"Benefits of monodisperse gold nanoparticles for LFAs.\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/monodispersity-and-purity-advantages-for-biosensing\" target=\"_blank\"\u003eBenefits of monodisperse Gold Nanoparticles for LFAs\u003c\/a\u003e\u003c\/em\u003e\u003c\/span\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eClean surface and reactant‑free matrix\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eMorphology:\u003c\/strong\u003e spherical gold nanoparticles, no other shapes. \u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eMatrix:\u003c\/strong\u003e reactant‑free aqueous colloidal suspension, low ionic strength.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThe \u003cstrong\u003ereactant‑free\u003c\/strong\u003e and \u003cstrong\u003estabilizer-free\u003c\/strong\u003e formulation minimizes interference with surface functionalization and reduces aggregation risk, helping maintain colloidal stability, signal intensity, and assay robustness over time. Find out\u003cem\u003e \u003cspan style=\"color: rgb(46, 23, 151);\"\u003e\u003ca rel=\"noopener\" title=\"Gold Nanoparticles in Pure Water for Reliable Surface Coating NanoBrand's synthesis advantage\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/why-stabilizing-agents-should-be-avoided-gold-nanoparticles\" style=\"color: rgb(46, 23, 151);\" target=\"_blank\"\u003eWhy should Stabilizing agents be Avoided.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eSurface options for flexible conjugation\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e- Citrate:\u003c\/b\u003e for passive adsorption of antibodies and proteins, ideal for rapid screening and conjugation optimization.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e- PEG5000‑carboxylate (thiol‑PEG‑COOH):\u003c\/b\u003e for covalent EDC\/NHS coupling to amine‑containing biomolecules, with reduced non‑specific binding and enhanced stability in complex matrices.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eThis flexibility lets align your conjugation strategy with assay format, stability requirements, and IVD regulatory needs. Find out \u003cspan style=\"color: rgb(30, 18, 155);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/surface-chemistry-as-the-real-product-when-you-buy-gold-nanoparticles\" title=\"The role of Gold Nanoparticles surface chemistry for various applications\" style=\"color: rgb(30, 18, 155);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eWhy is Surface Chemistry a \"real product\" for Gold Nanoparticles.\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eOptimized OD for biosensing\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eOptical density options: \u003c\/strong\u003eOD 20 and OD 50. These concentrations are tuned for robust conjugation performance and reliable signal generation in common biosensing formats. \u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eIVD‑oriented quality control and CoA\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eEach lot includes a detailed CoA with \u003cstrong\u003elot‑specific\u003c\/strong\u003e TEM images, size distribution, UV‑Vis spectra, hydrodynamic diameter, PdI, zeta potential, and key QC parameters, supporting internal QC, method validation, and regulatory submissions for IVD and medical diagnostic products. \u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cspan style=\"color: rgb(49, 23, 166);\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eConsult a typical \u003c\/span\u003e\u003cspan style=\"color: rgb(34, 15, 118);\"\u003e\u003cem\u003e\u003ca rel=\"noopener\" title=\"CoA example for 40 nm Gold Nanoparticles with PEG-carboxyl surface OD=50 IVD-READY\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_40nm_IVD-READY_Gold_Nano-Spheres_OD_50_PEG5000-carboxyl.pdf?v=1780512960\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(44, 20, 153);\"\u003eCoA for 40nm Gold Nano-Spheres, PEG5K-CARB, OD=50\u003c\/span\u003e\u003c\/a\u003e and \u003ca rel=\"noopener\" title=\"CoA example for 40 nm Gold nanoparticles with Citrate surface OD=20 IVD-READY\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_40nm_IVD-READY_Gold_Nano-Spheres_OD_20_citrate.pdf?v=1780512944\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(35, 13, 135);\"\u003eCoA for 40nm Gold Nano-Spheres, Citrate, OD=20\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eWhen to choose 40 nm\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThe \u003cb\u003e40 nm IVD‑READY Gold Nanoparticles\u003c\/b\u003e format is ideal for IVD assays that require a balance of strong signal, low background, and highly controlled bioconjugation. It is particularly suited for quantitative LFAs, ELISA‑type colorimetric tests, and IVD biosensors where precise antibody orientation and reproducible analytical performance are critical. \u003cstrong\u003eChoose \u003c\/strong\u003e\u003cb\u003e40 nm IVD‑READY Gold Nanoparticles\u003c\/b\u003e when you need high‑quality optical response with cleaner backgrounds than larger particles and greater per‑particle signal than smaller diameters, using this size as a versatile mid‑range benchmark during IVD biosensing assay optimization. Learn more about \u003cspan style=\"color: rgb(17, 24, 151);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/pages\/gold-nanoparticles-smart-drug-delivery-for-modern-medicine\" title=\"Gold Nanoparticles in Biosensing and Personalized Medicine\" style=\"color: rgb(17, 24, 151);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eGold Nanoparticles in Biosensing and Personalized Medicine\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eCustomization and OEM Options\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eCustom diameters, optical densities, and PEG spacer lengths are available on request.\u003c\/strong\u003e \u003cspan style=\"color: rgb(15, 21, 149);\"\u003e\u003ca style=\"color: rgb(15, 21, 149);\" href=\"https:\/\/www.nanobrand.com\/pages\/contact\" title=\"NanoBrand contact for customization of Gold Nanoparticles\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eContact us\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e to discuss your specific requirements.\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eStorage and Stability\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e- Citrate‑coated: \u003c\/strong\u003estore at 4–25 °C, do not freeze. Gently shake before use.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e- PEG‑COOH:\u003c\/strong\u003e store at 2–8 °C, do not freeze. Gently shake before use.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eUnder these conditions, products are typically stable for at least 12 months. For long‑term storage, check UV‑Vis spectra periodically to confirm colloidal and optical stability.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eSafety and Handling\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eNanoBrand does not guarantee the suitability of its products for any particular application. It is the customer’s responsibility to ensure that the product is appropriate and permitted for the intended use, in accordance with applicable regulations and internal quality systems. Please consult our\u003ci\u003e \u003cspan style=\"color: rgb(21, 28, 162);\"\u003e\u003ca style=\"color: rgb(21, 28, 162);\" title=\"NanoBrand Terms of Service\" href=\"https:\/\/www.nanobrand.com\/policies\/terms-of-service\" target=\"_blank\"\u003eTerms of Service\u003c\/a\u003e\u003c\/span\u003e\u003c\/i\u003e and follow institutional guidelines for the safe handling and disposal of nanomaterials.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eBrowse more sizes in \u003cem\u003e\u003cspan style=\"color: rgb(51, 18, 161);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-ivd-ready-series\" title=\"IVD-READY Gold nanoparticles collection\" style=\"color: rgb(51, 18, 161);\" rel=\"noopener\" target=\"_blank\"\u003eIVD-READY Collection\u003c\/a\u003e\u003c\/span\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eDiscover\u003cem\u003e \u003cspan style=\"color: rgb(45, 22, 146);\"\u003e\u003ca title=\"Gold Nanoparticles - Spherical, Citrate Surface\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-citrate-surface\" rel=\"noopener\" style=\"color: rgb(45, 22, 146);\" target=\"_blank\"\u003eGold Nanoparticles - Spherical, Citrate Surface\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003cspan style=\"color: rgb(33, 15, 149);\"\u003e\u003cem\u003e \u003c\/em\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eand\u003c\/span\u003e\u003cem\u003e \u003cspan style=\"color: rgb(34, 15, 153);\"\u003e\u003ca title=\"Gold Nanostars\" rel=\"noopener\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanostars\" style=\"color: rgb(34, 15, 153);\" target=\"_blank\"\u003eGold Nanostars.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\" lang=\"EN-CA\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/all_particles_free_of_final.png?v=1753887881\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"NanoBrand","offers":[{"title":"PEG5000-COOH \/ 20 \/ 1 ml","offer_id":52467185516825,"sku":"NB-GSP-IVD-100-5CARB-20-1","price":242.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 2 ml","offer_id":52467185549593,"sku":"NB-GSP-IVD-100-5CARB-20-2","price":385.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 3 ml","offer_id":52467185582361,"sku":"NB-GSP-IVD-100-5CARB-20-3","price":510.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 5 ml","offer_id":52467185615129,"sku":"NB-GSP-IVD-100-5CARB-20-5","price":704.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 10 ml","offer_id":52467185647897,"sku":"NB-GSP-IVD-100-5CARB-20-10","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 20 ml","offer_id":52467185680665,"sku":"NB-GSP-IVD-100-5CARB-20-20","price":1880.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 30 ml","offer_id":52467185713433,"sku":"NB-GSP-IVD-100-5CARB-20-30","price":2310.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 0.5 ml","offer_id":52467185746201,"sku":"NB-GSP-IVD-100-5CARB-50-0.5","price":320.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 1 ml","offer_id":52467185778969,"sku":"NB-GSP-IVD-100-5CARB-50-1","price":605.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 2 ml","offer_id":52467185811737,"sku":"NB-GSP-IVD-100-5CARB-50-2","price":960.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 3 ml","offer_id":52467185844505,"sku":"NB-GSP-IVD-100-5CARB-50-3","price":1230.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 5 ml","offer_id":52467185877273,"sku":"NB-GSP-IVD-100-5CARB-50-5","price":1770.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 10 ml","offer_id":52467185910041,"sku":"NB-GSP-IVD-100-5CARB-50-10","price":2990.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 1 ml","offer_id":52467185942809,"sku":"NB-GSP-IVD-100-CIT-20-1","price":231.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 2 ml","offer_id":52467185975577,"sku":"NB-GSP-IVD-100-CIT-20-2","price":368.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 5 ml","offer_id":52467186008345,"sku":"NB-GSP-IVD-100-CIT-20-5","price":672.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 10 ml","offer_id":52467186041113,"sku":"NB-GSP-IVD-100-CIT-20-10","price":1145.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 20 ml","offer_id":52467186073881,"sku":"NB-GSP-IVD-100-CIT-20-20","price":1794.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 30 ml","offer_id":52467186106649,"sku":"NB-GSP-IVD-100-CIT-20-30","price":2205.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 60 ml","offer_id":52467186139417,"sku":"NB-GSP-IVD-100-CIT-20-60","price":3581.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/40nm-PEG-gold-nanoparticles-tem-closeup.png?v=1777480581"},{"product_id":"20-nm-ivd-ready-gold-nanoparticles-for-biosensing","title":"20 nm IVD‑READY Gold Nanoparticles for Biosensing","description":"\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eNanoBrand \u003cb\u003e20 nm IVD‑READY Gold Nanoparticles\u003c\/b\u003e are \u003cstrong\u003eoptimized\u003c\/strong\u003e for IVD assays that require high surface‑area loading and excellent colloidal stability. 20 nm core size provides well‑defined plasmonic color with minimal steric hindrance, making them ideal for high‑specificity LFAs, sensitive ELISA‑type colorimetric IVD tests, and advanced biosensing platforms where precise biomolecule conjugation, low background, and reproducible analytical performance are critical for diagnostic accuracy and assay robustness.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Application focus\u003c\/strong\u003e: IVD biosensing, rapid tests, ELISA, microfluidics, biosensors, LFAs\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Format:\u003c\/strong\u003e Aqueous colloidal suspension, ready for bioconjugation\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e- Grade:\u003c\/strong\u003e Research and development, suitable for transition to commercial IVD use\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 id=\"high-monodispersity-for-reliable-diagnostics\" class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\"\u003e\u003cstrong\u003eHigh monodispersity for reliable diagnostics\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eCore diameter: \u003c\/strong\u003e20 nm, narrow size distribution\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCoV (coefficient of variation): \u003c\/strong\u003e≤ 5%\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePolydispersity index: \u003c\/strong\u003ePdI ≤ 0.1\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eTightly controlled monodispersity\u003c\/strong\u003e ensures uniform localized surface plasmon resonance, generating a strong, consistent red signal and predictable optical response in IVD biosensing assays. This uniformity improves \u003cstrong\u003elot‑to‑lot reproducibility\u003c\/strong\u003e and provides more reliable limits of detection than polydisperse gold nanoparticle colloids. The narrow size distribution and clean, reactant‑free surface chemistry support \u003cstrong\u003erobust antibody and biomolecule conjugation\u003c\/strong\u003e, enabling sensitive, reproducible detection of proteins, antibodies, and nucleic acids in clinical diagnostics and research applications. \u003cspan\u003eExplore more about the \u003cspan style=\"color: rgb(17, 25, 182);\"\u003e\u003cem\u003e\u003ca rel=\"noopener\" style=\"color: rgb(17, 25, 182);\" title=\"Benefits of monodisperse gold nanoparticles for LFAs.\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/monodispersity-and-purity-advantages-for-biosensing\" target=\"_blank\"\u003eBenefits of monodisperse Gold Nanoparticles for LFAs\u003c\/a\u003e\u003c\/em\u003e\u003c\/span\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eClean surface and reactant‑free matrix\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eMorphology:\u003c\/strong\u003e spherical gold nanoparticles, no other shapes. \u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cstrong\u003eMatrix:\u003c\/strong\u003e reactant‑free aqueous colloidal suspension, low ionic strength.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThe \u003cstrong\u003ereactant‑free\u003c\/strong\u003e and \u003cstrong\u003estabilizer-free\u003c\/strong\u003e formulation minimizes interference with surface functionalization and reduces aggregation risk, helping maintain colloidal stability, signal intensity, and assay robustness over time. Find out\u003cem\u003e \u003cspan style=\"color: rgb(46, 23, 151);\"\u003e\u003ca rel=\"noopener\" title=\"Gold Nanoparticles in Pure Water for Reliable Surface Coating NanoBrand's synthesis advantage\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/why-stabilizing-agents-should-be-avoided-gold-nanoparticles\" style=\"color: rgb(46, 23, 151);\" target=\"_blank\"\u003eWhy should Stabilizing agents be Avoided.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eSurface options for flexible conjugation\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e- Citrate:\u003c\/b\u003e for passive adsorption of antibodies and proteins, ideal for rapid screening and conjugation optimization.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e- PEG5000‑carboxylate (thiol‑PEG‑COOH):\u003c\/b\u003e for covalent EDC\/NHS coupling to amine‑containing biomolecules, with reduced non‑specific binding and enhanced stability in complex matrices.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eThis flexibility lets align your conjugation strategy with assay format, stability requirements, and IVD regulatory needs. Find out \u003cspan style=\"color: rgb(30, 18, 155);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/surface-chemistry-as-the-real-product-when-you-buy-gold-nanoparticles\" title=\"The role of Gold Nanoparticles surface chemistry for various applications\" style=\"color: rgb(30, 18, 155);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eWhy is Surface Chemistry a \"real product\" for Gold Nanoparticles.\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eOptimized OD for biosensing\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eOptical density options: \u003c\/strong\u003eOD 20 and OD 50. These concentrations are tuned for robust conjugation performance and reliable signal generation in common biosensing formats. \u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eIVD‑oriented quality control and CoA\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eEach lot includes a detailed CoA with \u003cstrong\u003elot‑specific\u003c\/strong\u003e TEM images, size distribution, UV‑Vis spectra, hydrodynamic diameter, PdI, zeta potential, and key QC parameters, supporting internal QC, method validation, and regulatory submissions for IVD and medical diagnostic products. \u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cspan style=\"color: rgb(49, 23, 166);\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eConsult a typical\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_20nm_IVD-READY_Gold_Nano-Spheres_OD_50_PEG5000-carboxyl.pdf?v=1780512960\" title=\"CoA example for 20nm Gold Nanoparticles with PEG-carboxyl surface IVD-READY\" rel=\"noopener\" target=\"_blank\"\u003e \u003c\/a\u003e\u003c\/span\u003e\u003cspan style=\"color: rgb(34, 15, 118);\"\u003e\u003cem\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_20nm_IVD-READY_Gold_Nano-Spheres_OD_50_PEG5000-carboxyl.pdf?v=1780512960\" title=\"CoA example for 20nm Gold Nanoparticles with PEG-carboxyl surface IVD-READY\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(44, 20, 153);\"\u003eCoA for 20nm Gold Nano-Spheres, PEG5K-CARB, OD=50\u003c\/span\u003e\u003c\/a\u003e and \u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_20nm_IVD-READY_Gold_Nano-Spheres_OD_20_citrate.pdf?v=1780512944\" title=\"CoA example for 20 nm Gold nanoparticles with Citrate surface OD=20 IVD-READY\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: rgb(35, 13, 135);\"\u003eCoA for 20nm Gold Nano-Spheres, Citrate, OD=20\u003c\/span\u003e\u003c\/a\u003e.\u003c\/em\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eWhen to choose 20 nm\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThe \u003cb\u003e20 nm IVD‑READY Gold Nanoparticles\u003c\/b\u003e format is ideal for IVD assays that require high surface‑area loading, excellent colloidal stability, and precise biomolecule conjugation. It is particularly suited for sensitive ELISA‑type colorimetric tests, nucleic‑acid‑based assays, and IVD biosensors where low background, and tight control of antibody or probe density are critical. \u003cb\u003eChoose 20 nm IVD‑READY Gold Nanoparticles\u003c\/b\u003e when you need reliable optical response with minimal steric hindrance and maximal functional surface, using this size as a small‑diameter benchmark for high‑specificity IVD biosensing assay optimization. Learn more about \u003cspan style=\"color: rgb(17, 24, 151);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/pages\/gold-nanoparticles-smart-drug-delivery-for-modern-medicine\" title=\"Gold Nanoparticles in Biosensing and Personalized Medicine\" style=\"color: rgb(17, 24, 151);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eGold Nanoparticles in Biosensing and Personalized Medicine\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e.\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eCustomization and OEM Options\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003eCustom diameters, optical densities, and PEG spacer lengths are available on request.\u003c\/strong\u003e \u003cspan style=\"color: rgb(15, 21, 149);\"\u003e\u003ca style=\"color: rgb(15, 21, 149);\" href=\"https:\/\/www.nanobrand.com\/pages\/contact\" title=\"NanoBrand contact for customization of Gold Nanoparticles\" rel=\"noopener\" target=\"_blank\"\u003e\u003cem\u003eContact us\u003c\/em\u003e\u003c\/a\u003e\u003c\/span\u003e to discuss your specific requirements.\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eStorage and Stability\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e- Citrate‑coated: \u003c\/strong\u003estore at 4–25 °C, do not freeze. Gently shake before use.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cstrong\u003e- PEG‑COOH:\u003c\/strong\u003e store at 2–8 °C, do not freeze. Gently shake before use.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eUnder these conditions, products are typically stable for at least 12 months. For long‑term storage, check UV‑Vis spectra periodically to confirm colloidal and optical stability.\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eSafety and Handling\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eNanoBrand does not guarantee the suitability of its products for any particular application. It is the customer’s responsibility to ensure that the product is appropriate and permitted for the intended use, in accordance with applicable regulations and internal quality systems. Please consult our\u003ci\u003e \u003cspan style=\"color: rgb(21, 28, 162);\"\u003e\u003ca style=\"color: rgb(21, 28, 162);\" title=\"NanoBrand Terms of Service\" href=\"https:\/\/www.nanobrand.com\/policies\/terms-of-service\" target=\"_blank\"\u003eTerms of Service\u003c\/a\u003e\u003c\/span\u003e\u003c\/i\u003e and follow institutional guidelines for the safe handling and disposal of nanomaterials.\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eBrowse more sizes in \u003cem\u003e\u003cspan style=\"color: rgb(48, 12, 166);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-ivd-ready-series\" target=\"_blank\" title=\"IVD-READY Gold Nanoparticles collection\" style=\"color: rgb(48, 12, 166);\" rel=\"noopener\"\u003eIVD-READY Collection\u003c\/a\u003e\u003c\/span\u003e.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003eDiscover\u003cem\u003e \u003cspan style=\"color: rgb(45, 22, 146);\"\u003e\u003ca title=\"Gold Nanoparticles - Spherical, Citrate Surface\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-citrate-surface\" rel=\"noopener\" style=\"color: rgb(45, 22, 146);\" target=\"_blank\"\u003eGold Nanoparticles - Spherical, Citrate Surface\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003cspan style=\"color: rgb(33, 15, 149);\"\u003e\u003cem\u003e \u003c\/em\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eand\u003c\/span\u003e\u003cem\u003e \u003cspan style=\"color: rgb(34, 15, 153);\"\u003e\u003ca title=\"Gold Nanostars\" rel=\"noopener\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanostars\" style=\"color: rgb(34, 15, 153);\" target=\"_blank\"\u003eGold Nanostars.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\" lang=\"EN-CA\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/all_particles_free_of_final.png?v=1753887881\"\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"NanoBrand","offers":[{"title":"PEG5000-COOH \/ 20 \/ 1 ml","offer_id":52467979878681,"sku":"NB-GSP-IVD-100-5CARB-20-1","price":242.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 2 ml","offer_id":52467979911449,"sku":"NB-GSP-IVD-100-5CARB-20-2","price":385.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 3 ml","offer_id":52467979944217,"sku":"NB-GSP-IVD-100-5CARB-20-3","price":510.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 5 ml","offer_id":52467979976985,"sku":"NB-GSP-IVD-100-5CARB-20-5","price":704.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 10 ml","offer_id":52467980009753,"sku":"NB-GSP-IVD-100-5CARB-20-10","price":1195.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 20 ml","offer_id":52467980042521,"sku":"NB-GSP-IVD-100-5CARB-20-20","price":1880.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 20 \/ 30 ml","offer_id":52467980075289,"sku":"NB-GSP-IVD-100-5CARB-20-30","price":2310.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 0.5 ml","offer_id":52467980108057,"sku":"NB-GSP-IVD-100-5CARB-50-0.5","price":320.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 1 ml","offer_id":52467980140825,"sku":"NB-GSP-IVD-100-5CARB-50-1","price":605.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 2 ml","offer_id":52467980173593,"sku":"NB-GSP-IVD-100-5CARB-50-2","price":960.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 3 ml","offer_id":52467980206361,"sku":"NB-GSP-IVD-100-5CARB-50-3","price":1230.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 5 ml","offer_id":52467980239129,"sku":"NB-GSP-IVD-100-5CARB-50-5","price":1770.0,"currency_code":"USD","in_stock":true},{"title":"PEG5000-COOH \/ 50 \/ 10 ml","offer_id":52467980271897,"sku":"NB-GSP-IVD-100-5CARB-50-10","price":2990.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 1 ml","offer_id":52467980304665,"sku":"NB-GSP-IVD-100-CIT-20-1","price":231.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 2 ml","offer_id":52467980337433,"sku":"NB-GSP-IVD-100-CIT-20-2","price":368.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 5 ml","offer_id":52467980370201,"sku":"NB-GSP-IVD-100-CIT-20-5","price":672.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 10 ml","offer_id":52467980402969,"sku":"NB-GSP-IVD-100-CIT-20-10","price":1145.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 20 ml","offer_id":52467980435737,"sku":"NB-GSP-IVD-100-CIT-20-20","price":1794.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 30 ml","offer_id":52467980468505,"sku":"NB-GSP-IVD-100-CIT-20-30","price":2205.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 60 ml","offer_id":52467980501273,"sku":"NB-GSP-IVD-100-CIT-20-60","price":3581.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/20nm-PEG-gold-nanoparticles-tem-closeup.png?v=1777479784"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/collections\/IVD_collection_abf15d6a-63ac-4a2e-a666-9c76f9ab048d.png?v=1780580161","url":"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-ivd-ready-series.oembed","provider":"NanoBrand ","version":"1.0","type":"link"}