50 nm Gold Nanospheres
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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 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. Contact us for custom formulations, ISO 13485/cGMP compliant materials, or click below for 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 | Citrate | BPEI | Lipoic acid | mPEG 5 kDa | Polystyrene 50 kDa | PVP 40 kDa | PVP 40 kDa | Silanol | Amine |
| 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) |
| Storage & Handling | Download | Download | Download | Download | Download | Download | Download | Download | Download |
| 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 |