{"product_id":"100-nm-gold-nanoparticles-spherical-citrate-surface","title":"100 nm Gold Nanoparticles - Spherical, Citrate-Coated","description":"\u003ch2\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThese 100 nm citrate‑coated gold nanospheres provide a well‑defined, monodisperse platform for optical assays, bioconjugation, and method development in diagnostics and bioanalytical research. Their controlled size, surface chemistry, and optical response make them a robust starting point for reproducible nanoparticle‑based experiments.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Specifications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eCore diameter 100 nm, narrow size distribution:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e- CoV (Coefficient of variation) ≤ 5%, Polydispersity index (PdI) ≤ 0.1. Learn\u003cem\u003e \u003cspan style=\"color: rgb(38, 18, 130);\"\u003e\u003ca style=\"color: rgb(38, 18, 130);\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/why-monodispersity-is-important\" title=\"Why is monodispersity important for customers? NanoBrand Synthesis\" rel=\"noopener\" target=\"_blank\"\u003eWhy is Monodispersity Important.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eMorphology:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e- spherical gold nanoparticles (nanospheres), no other shapes. \u003c\/p\u003e\n\u003ch3 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eSurface:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e- citrate‑coated for electrostatic stabilization, negative surface charge. Discover \u003cspan style=\"color: rgb(21, 21, 142);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(21, 21, 142);\" title=\"True Citrate Surface NanoBrand Gold Nanoparticles\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/what-is-true-citrate-surface-gold-nanoparticles\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cem\u003eWhat is True Citrate Surface.\u003c\/em\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eMatrix: \u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e- reactant-free, in Milli-Q water (18.2 MΩ-cm). Find out\u003cem\u003e \u003cspan style=\"color: rgb(36, 15, 128);\"\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(36, 15, 128);\" target=\"_blank\"\u003eWhy should Stabilizing agents be Avoided.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eSupplied with:\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e- \u003cem\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eLot-specific Certificate of Analysis\u003c\/span\u003e \u003c\/em\u003eincluding TEM images, size distribution, UV-vis spectra, PdI, hydrodynamic diameter, Zeta-potential, etc.\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 style=\"color: rgb(34, 15, 118);\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/CoA_example_100nm_Gold_Nano-Spheres_Citrate.pdf?v=1750702255\" title=\"CoA for 100 nm Gold Nanoparticles, Citrate Surface\" rel=\"noopener\" target=\"_blank\"\u003eCoA for 100 nm Gold Nanoparticles, Citrate Surface\u003c\/a\u003e.\u003c\/em\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\"\u003e\u003cstrong\u003eSurface Chemistry and Conjugation\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eThe citrate layer provides a negatively charged, weakly bound capping that can be readily displaced or over‑coated for protein, peptide, or oligonucleotide attachment. This controllable surface chemistry supports both passive adsorption and covalent coupling strategies, enabling predictable ligand loading and assay‑to‑assay consistency. \u003cspan style=\"color: rgb(0, 0, 0);\"\u003eDiscover\u003c\/span\u003e \u003cspan style=\"color: rgb(42, 21, 138);\"\u003e\u003ca style=\"color: rgb(42, 21, 138);\" rel=\"noopener\" title=\"Gold Nanoparticle Surface Chemistry: Why Ligands Matter More Than Size\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/surface-chemistry-as-the-real-product-when-you-buy-gold-nanoparticles\" 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 id=\"h2-optical-properties\" class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\"\u003e\u003cstrong\u003eOptical Properties\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThese gold nanospheres exhibit characteristic plasmonic absorption and scattering suitable for colorimetric and spectroscopic readouts. Their optical density and extinction profile are optimized for applications such as lateral flow test visualization, microplate assays, and microscopy‑based detection.\u003c\/p\u003e\n\u003ch2 id=\"h2-applications\" class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\"\u003e\u003cstrong\u003eApplications\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eCitrate‑coated 100 nm gold nanospheres are suited for antibody and aptamer conjugates, biosensing platforms, and imaging probes. They can be integrated into lateral flow formats, ELISA‑type assays, and proof‑of‑concept drug delivery or cell interaction studies where well‑characterized colloidal gold is required. Please visit \u003ci\u003e\u003cspan style=\"color: rgb(49, 21, 172);\"\u003e\u003cspan style=\"color: rgb(41, 18, 145);\"\u003e\u003ca style=\"color: rgb(41, 18, 145);\" href=\"https:\/\/www.nanobrand.com\/pages\/biocompatible-nanogold-for-therapeutic-and-diagnostic\" title=\"Biocompatible Nano-Gold\" rel=\"noopener\" target=\"_blank\"\u003eBiocompatible Nano-Gold\u003c\/a\u003e\u003c\/span\u003e \u003c\/span\u003e\u003c\/i\u003e\u003cspan style=\"color: rgb(49, 21, 172);\"\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003efor more applications details.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"font-editorial font-bold mb-2 mt-4 [.has-inline-images_\u0026amp;]:clear-end text-base first:mt-0\" id=\"h2-quality-control-and-batch-reproducibility\"\u003e\u003cstrong\u003eQuality Control and Batch Reproducibility\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eEach lot is manufactured using controlled synthesis protocols and is characterized for core size, size distribution, plasmon peak position, and colloidal stability. \u003cem\u003eTight lot‑to‑lot reproducibility reduces re‑optimization effort and helps maintain consistent performance across development and production runs. \u003c\/em\u003eSee\u003cem\u003e \u003cspan style=\"color: rgb(44, 19, 154);\"\u003e\u003ca style=\"color: rgb(44, 19, 154);\" rel=\"noopener\" title=\"Lot‑to‑Lot Reproducibility of Citrate-coated Gold Nanoparticles, NanoBrand\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/when-20-nm-gold-is-really-20-nm-every-time\" target=\"_blank\"\u003eComparison of Three Independent NanoBrand Gold Nanoparticles Lots\u003c\/a\u003e. \u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eEco-friendly synthesis\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eOur Green chemistry approach minimizes the use of harsh reagents and reduces the environmental impact of nanoparticle production, aligning with sustainable research practices.\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cb\u003eStorage and Expiration\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eThe nanoparticles are supplied ready‑to‑use in liquid form, with recommended storage conditions indicated on the Certificate of Analysis. To maintain colloidal stability, avoid freeze‑thaw cycles and follow the guidelines for dilution, mixing, and conjugate preparation. Products can be used for at least one year. If kept longer, measurement of UV-vis spectra is recommended to confirm products stability. Storage at lower temperatures is preferable for increasing the shelf life - DO NOT FREEZE.\u003c\/p\u003e\n\u003ch2\u003e\u003cb\u003eSafety and Handling\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eNanoBrand does not guarantee the suitability of its products for any particular application. It is the customer’s sole responsibility, prior to use, to determine that the product is suitable and permitted for the customer’s intended use and application. Please consult our\u003ci\u003e \u003cspan style=\"color: rgb(39, 17, 141);\"\u003e\u003cspan style=\"color: rgb(41, 17, 146);\"\u003e\u003ca rel=\"noopener\" style=\"color: rgb(41, 17, 146);\" 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\/span\u003e\u003c\/i\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eGo back to\u003cem\u003e \u003cspan style=\"color: rgb(43, 19, 150);\"\u003e\u003ca style=\"color: rgb(43, 19, 150);\" rel=\"noopener\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-citrate-surface\" title=\"Gold Nanoparticles - Spherical, Citrate Surface\" target=\"_blank\"\u003eGold Nanoparticles - Spherical, Citrate Surface.\u003c\/a\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003eDiscover\u003cem\u003e \u003ca href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-ivd-ready-series\" target=\"_blank\" title=\"Gold Nanoparticles IVD-READY\" rel=\"noopener\"\u003e\u003cspan style=\"color: rgb(33, 15, 149);\"\u003eGold Nanoparticles IVD-READY\u003c\/span\u003e\u003c\/a\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 \u003ca style=\"color: rgb(33, 15, 149);\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanostars\" rel=\"noopener\" title=\"Gold Nanostars\" target=\"_blank\"\u003eGold Nanostars.\u003c\/a\u003e \u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\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\/p\u003e","brand":"NanoBrand","offers":[{"title":"Citrate \/ 1 \/ 10 ml","offer_id":52295965802777,"sku":"NB-GSP-100-CIT-1-10","price":116.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 1 \/ 20 ml","offer_id":52295965835545,"sku":"NB-GSP-100-CIT-1-20","price":147.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 1 \/ 30 ml","offer_id":52295965868313,"sku":"NB-GSP-100-CIT-1-30","price":179.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 1 \/ 60 ml","offer_id":52295965901081,"sku":"NB-GSP-100-CIT-1-60","price":231.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 1 \/ 125 ml","offer_id":52295965933849,"sku":"NB-GSP-100-CIT-1-125","price":368.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 1 \/ 250 ml","offer_id":52295965966617,"sku":"NB-GSP-100-CIT-1-250","price":567.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 1 \/ 500 ml","offer_id":52295965999385,"sku":"NB-GSP-100-CIT-1-500","price":935.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 1 \/ 1 000 ml","offer_id":52295966032153,"sku":"NB-GSP-100-CIT-1-1000","price":1360.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 5 ml","offer_id":52295966064921,"sku":"NB-GSP-100-CIT-10-5","price":336.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 10 ml","offer_id":52295966097689,"sku":"NB-GSP-100-CIT-10-10","price":573.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 20 ml","offer_id":52295966130457,"sku":"NB-GSP-100-CIT-10-20","price":897.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 30 ml","offer_id":52295966163225,"sku":"NB-GSP-100-CIT-10-30","price":1103.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 60 ml","offer_id":52295966195993,"sku":"NB-GSP-100-CIT-10-60","price":1790.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 125 ml","offer_id":52295966228761,"sku":"NB-GSP-100-CIT-10-125","price":2814.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 250 ml","offer_id":52295966261529,"sku":"NB-GSP-100-CIT-10-250","price":4326.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 500 ml","offer_id":52295966294297,"sku":"NB-GSP-100-CIT-10-500","price":7035.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 10 \/ 1 000 ml","offer_id":52295966327065,"sku":"NB-GSP-100-CIT-10-1000","price":12075.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 1 ml","offer_id":52295966359833,"sku":"NB-GSP-100-CIT-20-1","price":231.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 2 ml","offer_id":52295966392601,"sku":"NB-GSP-100-CIT-20-2","price":368.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 5 ml","offer_id":52295966425369,"sku":"NB-GSP-100-CIT-20-5","price":672.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 10 ml","offer_id":52295966458137,"sku":"NB-GSP-100-CIT-20-10","price":1145.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 20 ml","offer_id":52295966490905,"sku":"NB-GSP-100-CIT-20-20","price":1794.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 30 ml","offer_id":52295966523673,"sku":"NB-GSP-100-CIT-20-30","price":2205.0,"currency_code":"USD","in_stock":true},{"title":"Citrate \/ 20 \/ 60 ml","offer_id":52295966556441,"sku":"NB-GSP-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-citrate-gold-nanoparticle-tem-closeup.png?v=1779313107","url":"https:\/\/www.nanobrand.com\/products\/100-nm-gold-nanoparticles-spherical-citrate-surface","provider":"NanoBrand ","version":"1.0","type":"link"}