50 nm Gold Nanospheres
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50 nm spherical gold nanoparticles are useful in applications such as biosensors, plasmonic optical effects, and drug delivery systems. For cell culture and other sensitive biological applications, a low-endotoxin formulation filtered through a 0.22 µm membrane is available at 1 mg/mL.
nanoComposix provides high quality, monodisperse, and aggregation-free nanomaterials. 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 bulk supply requirements.
| Overview | ||||
|---|---|---|---|---|
| Surface | Citrate | BPEI | Carboxyl | Silica Shelled |
| Description | Easiest standard surface to displace with other molecules. | Covalently bound. Conjugatable surface. | Covalently bound. Conjugatable surface. | Greatest solvent compatibility. Preserves plasmonic properties upon deposition. |
| Solvent | 0.05 mg/mL (AUCN50): 2 mM sodium citrate solution 1 mg/mL (AUCB50): 0.2 mM sodium citrate solution |
USP Purified Water | USP Purified Water | Ethanol |
| Surface chemistry | Citrate | BPEI | Lipoic acid | Silanol |
| Specifications | ||||
| Surface | Citrate | BPEI | Carboxyl | Silica Shelled |
| TEM Diameter | 50 ± 4 nm | 50 ± 4 nm | 50 ± 4 nm | Core: 50 ± 4 nm Shell: 20 ± 5 nm |
| CV | ≤ 15% | ≤ 15% | ≤ 15% | ≤ 15% (total diameter) |
| Endotoxin Content | ≤ 1 EU/mL (AUCB50) | ≤ 1 EU/mL (AUBB50) | ≤ 1 EU/mL (AULB50) | — |
| Documents | ||||
| Surface | Citrate | BPEI | Carboxyl | Silica Shelled |
| Example Certificate of Analysis (CoA) | Download | Download | Download | Download |
| Safety Data Sheet (SDS) | 0.05 mg/mL (AUCN50) 1 mg/mL (AUCB50) |
1 mg/mL (AUBB50) | 1 mg/mL (AULB50) | 1 mg/mL (AUSH50) |
| Storage & Handling | Download | Download | Download | Download |
| Expected Ranges | ||||
| Surface | Citrate | BPEI | Carboxyl | Silica Shelled |
| Hydrodynamic diameter (DLS) | TEM diameter + 2–12 nm | TEM diameter + 15–40 nm | TEM diameter + 3–12 nm | TEM diameter + 15–80 nm |
| Zeta potential | ≤ –15 mV | ≥ 25 mV | ≤ –15 mV | ≤ –10 mV |
| pH of solution | 5.5–8.5 | 7.0–8.5 | 5.5–7.5 | N/A |
| Peak wavelength (λmax) | 525–530 nm | 525–530 nm | 525–530 nm | 535–545 nm |