20 nm Gold Nanospheres
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20 nm spherical gold nanoparticles are used in a broad range of applications, including biosensors, plasmonic optical effects, and drug delivery systems. For cell culture and other sensitive biological applications, a sterile-filtered, low endotoxin formulation is available at 1 mg/mL concentration.
nanoComposix provides high quality nanomaterials that are precisely engineered and highly characterized. All our products are supplied with a batch-specific Certificate of Analysis including characterization data such as TEM, DLS, Zeta, and UV-Vis.
Intended for Research Use Only. Not for use in diagnostic procedures. Contact us for custom formulations and ISO 13485/cGMP compliant materials, or click below for bulk supply requirements.
| Overview | ||
|---|---|---|
| Surface | Citrate | Silica Shelled |
| Description | Easiest standard surface to displace with other molecules. | Greatest solvent compatibility. Preserves plasmonic properties upon deposition. |
| Solvent | 0.05 mg/mL (NanoXact): 2 mM sodium citrate solution 1 mg/mL (BioPure): USP purified water |
Ethanol |
| Surface chemistry | Citrate | Silanol |
| Specifications | ||
| Surface | Citrate | Silica Shelled |
| TEM Diameter | 20 ± 3 nm | Core: 20 ± 3 nm Shell: 20 ± 5 nm |
| CV | ≤ 15% | ≤ 15% (total diameter) |
| Documents | ||
| Surface | Citrate | Silica Shelled |
| Example Certificate of Analysis (CoA) | Download | Download |
| Safety Data Sheet (SDS) | 0.05 mg/mL (NanoXact) 1 mg/mL (BioPure) |
1 mg/mL (NanoXact) |
| Storage & Handling | Download | Download |
| Expected Ranges | ||
| Surface | Citrate | Silica Shelled |
| Hydrodynamic diameter (DLS) | TEM diameter + 2–12 nm | TEM diameter + 15–80 nm |
| Zeta potential | ≤ –15 mV | ≤ –10 mV |
| pH of solution | 5.5–8.5 | N/A |
| Peak wavelength (λmax) | 515–560 nm | 525–590 nm |