50 nm Gold Nanospheres

SKU: AUCN50-50M
AUYH50-10M, AUYH50-30M, and Dried PVP are expected to ship within 2–4 weeks; all other surfaces (including PVP in water) are expected to ship within 5 days. Please contact us if you have any questions.
$125.00 USD
Surface
Concentration
Volume

Customers outside of the US & Canada: please visit your local distributor’s website to purchase this item using its SKU, or contact us here. Thank you!
In stock items typically ship from our warehouse within 5 business days

As a global leader in gold nanoparticle production, nanoComposix specializes in providing high-purity and monodisperse nanomaterials – delivering the quality you need for consistent results.

50 nm spherical gold nanoparticles combine strong plasmonic optical properties with versatile surface functionalization capabilities. These nanoparticles are useful in a broad range of applications from immunodiagnostics, biosensors, sensing, optical effects, drug delivery, and more.

nanoComposix provides high quality nanomaterials that are precisely engineered and highly characterized. All products are supplied with batch-specific CoA’s including TEM, DLS, Zeta, and UV-Vis characterization data.

Intended for Research Use Only. Contact us for custom formulations, ISO 13485/cGMP compliant materials, or bulk supply requirements.
Overview
Surface Citrate BPEI Carboxyl PEG Polystyrene PVP PVP (dried) Silica Shelled Silica Shelled, Aminated
Description Easiest standard surface to displace with other molecules. Covalently bound. Conjugatable surface. Covalently bound. Conjugatable surface. Highest stability in aqueous buffers and polar organic solvents. Hydrophobic surface that allows for dispersion in a wide range of polar organic solvents. Large polymer surface. Stable in a wide variety of solvents. Powder format allows greater flexibility with solvent choice and concentration. Greatest solvent compatibility. Preserves plasmonic properties upon deposition. Conjugatable surface. Greatest solvent compatibility. Preserves plasmonic properties upon deposition.
Solvent 0.05 mg/mL (NanoXact): 2 mM sodium citrate solution
1 mg/mL (BioPure): 0.2 mM sodium citrate solution		 USP Purified Water USP Purified Water USP Purified Water Methylbenzene USP Purified Water N/A Ethanol Ethanol
Surface chemistry Sodium citrate BPEI Lipoic acid mPEG 5 kDa Polystyrene 50 kDa PVP 40 kDa PVP 40 kDa Silanol Silanol
Specifications
Surface Citrate BPEI Carboxyl PEG Polystyrene PVP PVP (dried) Silica Shelled Silica Shelled, Aminated
TEM Diameter 50 ± 4 nm 50 ± 4 nm 50 ± 4 nm 50 ± 4 nm 50 ± 4 nm 50 ± 4 nm 50 ± 4 nm Core: 50 ± 4 nm
Shell: 20 ± 5 nm		 Core: 50 ± 4 nm
Shell: 20 ± 5 nm
CV ≤ 15% ≤ 15% ≤ 15% ≤ 15% ≤ 15% ≤ 15% ≤ 15% ≤ 15% (total diameter) ≤ 15% (total diameter)
Documents
Surface Citrate BPEI Carboxyl PEG Polystyrene PVP PVP (dried) Silica Shelled Silica Shelled, Aminated
Example Certificate of Analysis (CoA) Download Download Download Download Download Download Download Download Download
Safety Data Sheet (SDS) 0.05 mg/mL (NanoXact)
1 mg/mL (BioPure)		 1 mg/mL (BioPure) 0.05 mg/mL (NanoXact)
1 mg/mL (BioPure)		 0.05 mg/mL (NanoXact)
1 mg/mL (BioPure)		 1 mg/mL (NanoXact) 0.05 mg/mL (NanoXact)
1 mg/mL (BioPure)		 Powder (NanoXact) 1 mg/mL (NanoXact) 1 mg/mL (NanoXact)
Protocols N/A N/A N/A N/A Polystyrene-Coated Gold Solvent Transfer Protocol N/A N/A N/A N/A
Expected Ranges
Surface Citrate BPEI Carboxyl PEG Polystyrene PVP PVP (dried) Silica Shelled Silica Shelled, Aminated
Hydrodynamic diameter (DLS) TEM diameter + 2–12 nm TEM diameter + 15–40 nm TEM diameter + 3–12 nm TEM diameter + 7–47 nm TEM diameter + 50–100 nm TEM diameter + 5–55 nm N/A TEM diameter + 15–80 nm TEM diameter + 15–90 nm
Zeta potential ≤ –15 mV ≥ 25 mV ≤ –15 mV ≤ 5 mV N/A ≤ –5 mV N/A ≤ –10 mV ≥ 10 mV
pH of solution 5.5–8.5 7.0–8.5 5.5–7.5 5.2–7.0 N/A 4.5–7.5 N/A N/A N/A
Peak wavelength (λmax) 515–560 nm 515–570 nm 515–570 nm 510–565 nm 530–600 nm 510–565 nm 510–565 nm (if redispersed) 525–590 nm 525–590 nm