{"product_id":"gold-nanostars-30nm","title":"Gold Nanostars 30 nm, surface: PVP, chitosan, LSPR peak 800-850nm, branches 15-30 nm","description":"\u003ch2 class=\"my-2 [\u0026amp;+p]:mt-4 [\u0026amp;_strong:has(+br)]:inline-block [\u0026amp;_strong:has(+br)]:pb-2\" style=\"text-align: left;\"\u003e\u003cstrong\u003eOverview\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eNanoBrand \u003cb\u003eGold Nanostars 30 nm\u003c\/b\u003e are anisotropic gold nanoparticles with an average 30 nm diameter and \u003cb\u003ebranched spikes of about 15–30 nm\u003c\/b\u003e, engineered for strong plasmonic enhancement in the NIR region. Their \u003cb\u003eLSPR peak is tuned within 800–850 nm\u003c\/b\u003e, making them ideal for SERS, bioimaging and NIR‑excited photothermal Life Science applications. The nanostars are supplied reactant‑free in high‑purity water with PVP or chitosan surface coatings, ensuring colloidal stability and convenient interfaces for further functionalization. \u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cb\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eKey specifications\u003c\/span\u003e\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eAverage diameter:\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003e 30 nm.\u003cbr\u003e\u003cb\u003eBranch length:\u003c\/b\u003e 15–30 nm (anisotropic spikes).\u003cbr\u003e\u003cb\u003eLSPR peak position:\u003c\/b\u003e 800–850 nm (near‑infrared).\u003cbr\u003e\u003cb\u003eSurface coating options:\u003c\/b\u003e PVP, chitosan. \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eLearn \u003cspan style=\"color: rgb(22, 28, 146);\"\u003e\u003ci\u003e\u003ca style=\"color: rgb(22, 28, 146);\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/why-do-not-we-sell-them-bare-gold-nanostars\" title=\"Gold nanostars with PVP or Chitosan surface coating for life science applications\" target=\"_blank\"\u003eWhy did we Chose not to Sell them Bare\u003c\/a\u003e.\u003c\/i\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cb\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eMatrix:\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003e reactant‑free Milli‑Q water (18.2 MΩ·cm). \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eFind out \u003ci\u003e\u003cspan style=\"color: rgb(15, 25, 133);\"\u003e\u003ca style=\"color: rgb(15, 25, 133);\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/why-stabilizing-agents-should-be-avoided-gold-nanoparticles\" title=\"Advantages of reactant-free and stabilizing agents-free media for gold nanostars\" target=\"_blank\"\u003eWhy should Stabilizing agents be Avoided\u003c\/a\u003e\u003c\/span\u003e.\u003c\/i\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eEach lot is supplied with a Certificate of Analysis including TEM images, UV‑Vis spectra, PdI, hydrodynamic diameter and zeta‑potential.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eConsult a typical \u003ci\u003e\u003cspan style=\"color: rgb(26, 26, 147);\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/Gold_Nanostars_LSPR_peak_800-850nm_PVP-coated_OD_1.pdf?v=1768608284\" title=\"CoA example Gold Nanostars LSPR 800\/850, surface PVP\" style=\"color: rgb(26, 26, 147);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCoA for Gold Nanostars LSPR 800-850, PVP\u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e \u003c\/i\u003eand\u003ci\u003e \u003cspan style=\"color: rgb(25, 25, 169);\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/Gold_Nanostars_LSPR_peak_800-850nm_chitosan-coated_OD_1.pdf?v=1768608329\" title=\"CoA example Gold Nanostars LSPR 800\/850 surface Chitosan\" style=\"color: rgb(25, 25, 169);\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003eCoA for Gold Nanostars LSPR 800-850, Chitosan\u003c\/span\u003e\u003c\/a\u003e.\u003c\/span\u003e\u003c\/i\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cb\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eControlled Geometry and Reproducible Optics\u003c\/span\u003e\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"text-align: justify;\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eFor each lot, average diameter and branch length are quantified from TEM, and an equivalent spherical diameter is calculated (Dequiv ≈ Dcore + ½ Lbr) to support accurate mass and concentration estimates. This control of nanostar geometry delivers consistent optical properties and reproducible LSPR peak positions from batch to batch, supporting robust assay development and comparative studies.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv style=\"text-align: left;\"\u003e\u003cimg height=\"282\" width=\"352\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/Image4_d3b79d87-c73a-44bf-bacd-eebe0a1bf294.png?v=1757426629\" alt=\"Gold nanostar nanobrand image core diameter branches length\" style=\"margin-right: auto; margin-left: auto; float: none; display: block;\"\u003e\u003c\/div\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e \u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003eAdvantages for Life Science Applications\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eNanoBrand Gold Nanostars are supplied as reactant‑free dispersions in water, avoiding stabilizers that may interfere with bioconjugation, SERS readout or imaging contrast. Narrow size and morphology distribution, lot‑to‑lot reproducibility and Green‑chemistry‑inspired synthesis make these nanostars well suited for diagnostics, biosensing, lateral flow assays and other biomedical applications. See \u003cspan style=\"color: rgb(19, 19, 139);\"\u003e\u003ci\u003e\u003ca title=\"Biocompatible gold nanoparticles applications\" href=\"https:\/\/www.nanobrand.com\/pages\/biocompatible-nanogold-for-therapeutic-and-diagnostic\" style=\"color: rgb(19, 19, 139);\" target=\"_blank\"\u003eBiocompatible Nano-Gold\u003c\/a\u003e\u003c\/i\u003e\u003c\/span\u003e for application details.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eCustom LSPR Peak and Morphology\u003c\/span\u003e\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eBy tuning nanostar geometry, we can position the LSPR peak anywhere between 600–1100 nm to match common laser lines and imaging windows. On request, we supply nanostars with customized morphology, LSPR peak, concentration and surface coating for specific assay, imaging, photothermal or theranostic protocols. To learn more, discover\u003cspan style=\"color: rgb(18, 28, 140);\"\u003e \u003ci\u003e\u003ca title=\"Explaining formation of nanostars hot spots and theit applications\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/what-are-gold-nanostars-hot-spots-and-why-do-they-matter\" style=\"color: rgb(18, 28, 140);\" target=\"_blank\"\u003eWhat are Gold Nanostars “hot spots” and why do they matter\u003c\/a\u003e\u003c\/i\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eCTAB‑free, Reactant‑free Dispersion\u003c\/span\u003e\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eOur nanostars are formulated as \u003cb\u003ereactant‑free \u003c\/b\u003edispersions in Milli‑Q water (18.2 MΩ·cm) with long‑term stability, without added CTAB, CTAC, Tweens, PBS or proprietary stabilizers that can interfere with biology or assay readouts. In contrast, many alternative products are supplied in surfactant‑rich buffers that complicate conjugation or increase background. Find out \u003cspan style=\"color: rgb(13, 31, 150);\"\u003e\u003ci\u003e\u003ca title=\"Advantages of stabilizer-free gold nanostars products\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/why-stabilizing-agents-should-be-avoided-gold-nanoparticles\" style=\"color: rgb(13, 31, 150);\" target=\"_blank\"\u003eWhy should Stabilizing agents be Avoided\u003c\/a\u003e\u003c\/i\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eReproducibility and Eco‑friendly Synthesis\u003c\/span\u003e\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003ePrecise \u003cb\u003elot‑to‑lot reproducibility\u003c\/b\u003e of nanoparticle size, LSPR peak, surface charge and concentration is essential for regulated biomedical, diagnostic and pharmaceutical workflows. Stable nanostars lots reduce batch‑to‑batch variability in lateral flow assays, biosensors and imaging agents. NanoBrand gold nanostars are produced using \u003cb\u003eGreen Chemistry‑inspired synthesis\u003c\/b\u003e that minimizes harsh reagents and reduces environmental impact, supporting laboratories that prioritize sustainable nanomaterials.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eNanoBrand Gold Nanostars (sharp, anisotropic spikes on a central core) are distinct from gold nanourchins, which have a rounded, raspberry‑like morphology. Nanostars are preferred when narrow, tunable NIR resonances and intense tip hot spots are required, while nanourchins suit broadband, rough‑surface SERS and large‑area substrates. For more details, read \u003cspan style=\"color: rgb(16, 35, 158);\"\u003e\u003ci\u003e\u003ca title=\"Differences between gold nanostars and gold nanourchins explained\" href=\"https:\/\/www.nanobrand.com\/blogs\/infos\/gold-nanostars-or-nanourchins-what-to-chose-biomedical-applications\" style=\"color: rgb(16, 35, 158);\" target=\"_blank\"\u003eWhat to Choose: Gold Nanostars or Gold Nanourchins\u003c\/a\u003e\u003c\/i\u003e.\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cb\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eStorage, Stability and Related Products\u003c\/span\u003e\u003c\/b\u003e\u003c\/h2\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eStore gold nanostars at 4–25 °C, protected from light, and DO NOT FREEZE. Gently mix before use; storage toward the lower end of the range generally improves shelf life. During storage, the LSPR peak may shift slightly within the specified window (for example, 900–950 nm), usually toward shorter wavelengths; for longer storage, measuring the UV–Vis spectrum before critical experiments is recommended.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003e\u003cspan style=\"mso-ansi-language: EN-CA;\"\u003eNanoBrand does not guarantee suitability for any particular application; customers must confirm that the product is appropriate and permitted for the intended use. Please consult our \u003cspan style=\"color: rgb(12, 12, 151);\"\u003e\u003ci\u003e\u003ca title=\"terms of service\" href=\"https:\/\/www.nanobrand.com\/policies\/terms-of-service\" style=\"color: rgb(12, 12, 151);\" target=\"_blank\"\u003eTerms of Service\u003c\/a\u003e\u003c\/i\u003e\u003c\/span\u003e and follow institutional safety guidelines when handling nanomaterials. \u003cb\u003eCustomized morphologies, LSPR peak positions, concentrations and surface coatings\u003c\/b\u003e (including alternative polymers or biofunctional shells) are available on request.\u003c\/span\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eGo back to\u003ci\u003e\u003cspan style=\"color: rgb(36, 25, 159);\"\u003e \u003ca rel=\"noopener\" style=\"color: rgb(36, 25, 159);\" title=\"Gold Nanostars Collection of Products\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanostars\" target=\"_blank\"\u003e\u003cu\u003eGold Nanostars\u003c\/u\u003e\u003c\/a\u003e\u003c\/span\u003e. \u003c\/i\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: justify;\" class=\"MsoNormal\"\u003eDiscover\u003ci\u003e \u003cspan style=\"color: rgb(39, 28, 160);\"\u003e\u003ca style=\"color: rgb(39, 28, 160);\" title=\"Gold Nanoparticles - Spherical, Citrate Surface\" href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-citrate-surface\" target=\"_blank\"\u003eGold Nanoparticles - Spherical, Citrate Surface\u003cspan style=\"text-decoration: underline;\"\u003e \u003c\/span\u003e\u003c\/a\u003e\u003c\/span\u003e\u003c\/i\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cspan style=\"color: rgb(39, 28, 160); text-decoration: underline;\"\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan style=\"color: rgb(39, 28, 160);\"\u003e\u003c\/span\u003e\u003ci\u003e\u003cspan style=\"color: rgb(39, 28, 160);\"\u003e\u003c\/span\u003e\u003c\/i\u003e\u003cspan style=\"color: rgb(0, 0, 0);\"\u003eand \u003ci\u003e\u003cspan style=\"color: rgb(38, 28, 151);\"\u003e\u003ca href=\"https:\/\/www.nanobrand.com\/collections\/gold-nanoparticles-ivd-ready-series\" target=\"_blank\" title=\"Gold Nanoparticles IVD-READY\" rel=\"noopener\"\u003eGold Nanoparticles IVD-READY\u003c\/a\u003e\u003ca style=\"color: rgb(38, 28, 151);\" title=\"Gold Nanoparticles for Lateral Flow Assays - Lateral-Flow-Easy Series\" href=\"https:\/\/www.nanobrand.com\/collections\/lateral-flow-easy-lfa-gold-nano-spheres\" target=\"_blank\"\u003e.\u003c\/a\u003e\u003c\/span\u003e\u003c\/i\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":"PVP \/ 1 \/ 5 ml","offer_id":51095772758297,"sku":"NB-GST-PVP-800\/850-1-5","price":620.0,"currency_code":"USD","in_stock":true},{"title":"PVP \/ 1 \/ 10 ml","offer_id":50506055221529,"sku":"NB-GST-PVP-800\/850-1-10","price":1160.0,"currency_code":"USD","in_stock":true},{"title":"PVP \/ 1 \/ 15 ml","offer_id":51095773282585,"sku":"NB-GST-PVP-800\/850-1-15","price":1635.0,"currency_code":"USD","in_stock":true},{"title":"PVP \/ 1 \/ 20 ml","offer_id":50506055254297,"sku":"NB-GST-PVP-800\/850-1-20","price":2085.0,"currency_code":"USD","in_stock":true},{"title":"PVP \/ 1 \/ 30 ml","offer_id":50506055287065,"sku":"NB-GST-PVP-800\/850-1-30","price":2940.0,"currency_code":"USD","in_stock":true},{"title":"PVP \/ 1 \/ 60 ml","offer_id":50506055319833,"sku":"NB-GST-PVP-800\/850-1-60","price":5180.0,"currency_code":"USD","in_stock":true},{"title":"PVP \/ 1 \/ 125 ml","offer_id":50506055352601,"sku":"NB-GST-PVP-800\/850-1-125","price":8980.0,"currency_code":"USD","in_stock":true},{"title":"Chitosan \/ 1 \/ 5 ml","offer_id":51095772823833,"sku":"NB-GST-CHI-800\/850-1-5","price":715.0,"currency_code":"USD","in_stock":true},{"title":"Chitosan \/ 1 \/ 10 ml","offer_id":50506055745817,"sku":"NB-GST-CHI-800\/850-1-10","price":1335.0,"currency_code":"USD","in_stock":true},{"title":"Chitosan \/ 1 \/ 15 ml","offer_id":51095773348121,"sku":"NB-GST-CHI-800\/850-1-15","price":1880.0,"currency_code":"USD","in_stock":true},{"title":"Chitosan \/ 1 \/ 20 ml","offer_id":50506055778585,"sku":"NB-GST-CHI-800\/850-1-20","price":2390.0,"currency_code":"USD","in_stock":true},{"title":"Chitosan \/ 1 \/ 30 ml","offer_id":50506055811353,"sku":"NB-GST-CHI-800\/850-1-30","price":3380.0,"currency_code":"USD","in_stock":true},{"title":"Chitosan \/ 1 \/ 60 ml","offer_id":50506055844121,"sku":"NB-GST-CHI-800\/850-1-60","price":5950.0,"currency_code":"USD","in_stock":true},{"title":"Chitosan \/ 1 \/ 125 ml","offer_id":50506055876889,"sku":"NB-GST-CHI-800\/850-1-125","price":10320.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/2977\/8457\/files\/30nm-gold-nanostars-tem-closeup.png?v=1777491181","url":"https:\/\/www.nanobrand.com\/products\/gold-nanostars-30nm","provider":"NanoBrand ","version":"1.0","type":"link"}