730807

Silver, dispersion

nanoparticles, 40 nm particle size (TEM), 0.02 mg/mL in aqueous buffer, contains sodium citrate as stabilizer

• Synonym(s): Colloidal silver
• Linear Formula: Ag
• CAS Number: 7440-22-4
• Molecular Weight: 107.87
• MDL number: MFCD00003397
• UNSPSC Code: 12352302
• PubChem Substance ID: 329764597
• NACRES: NA.23

Properties

• form: nanoparticles
• contains: sodium citrate as stabilizer
• concentration: 0.02 mg/mL in aqueous buffer
• refractive index: n20/D 1.333
• particle size: 40 nm (TEM)
• density: 0.990 g/mL at 25 °C
• fluorescence: λ_em 412 nm FWHM 63 nm
• storage temp.: 2-8°C
• SMILES string: [Ag]
• InChI: 1S/Ag
• InChI key: BQCADISMDOOEFD-UHFFFAOYSA-N

Description

General description

Our silver nanoparticles (40 nm in diameter) are spherical nanoparticles of metallic silver dispersed in an aqueous citrate buffer. This buffer stabilizes the dispersion; citrate ions adsorb onto the surface of the silver nanoparticles and create a protective layer that prevents aggregation. Because of the nanoparticles′ small size the nanoparticles exhibit quantum confined optical properties, most notably an emission wavelength of (λem) of412 nm with a full width at half maximum (FWHM) of only 63 nm, owing to the monodispersity of the particles. The optoelectronic properties in combination with a high surface area make our silver nanoparticles useful in biosensors and fluorescent imaging for the sensitive detection of biomolecules, pathogens, and environmental contaminants.

Application

• Silver as acrolein hydrogenation catalyst: intricate effects of catalyst nature and reactant partial pressures.: This study explores the use of silver as a catalyst for acrolein hydrogenation, highlighting the complex effects of catalyst nature and the partial pressures of reactants, which could inform future applications in industrial chemical processes (Bron et al., 2007).
• Surface-enhanced Raman analysis of sulfa drugs on colloidal silver dispersion.: This research discusses the application of surface-enhanced Raman spectroscopy (SERS) using colloidal silver dispersions for analyzing sulfa drugs, potentially enhancing detection methods in pharmaceutical research (Sutherland et al., 1990).

Safety Information

• Pictograms: GHS09
• Signal Word: Warning
• Hazard Statements: H410
• Precautionary Statements: P273 - P391 - P501
• Hazard Classifications: Aquatic Acute 1 - Aquatic Chronic 1
• Storage Class Code: 12 - Non Combustible Liquids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable