{"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","url":"https:\/\/www.nanobrand.com\/products\/20-nm-ivd-ready-gold-nanoparticles-for-biosensing","provider":"NanoBrand ","version":"1.0","type":"link"}