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Key Documents

730807

Sigma-Aldrich

Silver, dispersion

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

Synonyme(s) :

Colloidal silver

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About This Item

Formule linéaire :
Ag
Numéro CAS:
7440-22-4
Poids moléculaire :
107.87
Numéro MDL:
MFCD00003397
Code UNSPSC :
12352302
ID de substance PubChem :
329764597
Nomenclature NACRES :
NA.23

Forme

nanoparticles

Contient

sodium citrate as stabilizer

Concentration

0.02 mg/mL in aqueous buffer

Indice de réfraction

n20/D 1.333

Taille des particules

40 nm (TEM)

Densité

0.990 g/mL at 25 °C

Fluorescence

λem 412 nm FWHM 63 nm

Température de stockage

2-8°C

Chaîne SMILES 

[Ag]

InChI

1S/Ag

Clé InChI

BQCADISMDOOEFD-UHFFFAOYSA-N

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Description générale

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).

Pictogrammes

Environment
GHS09

Mention d'avertissement

Warning

Mentions de danger

H410

Conseils de prudence

P273 - P391 - P501

Classification des risques

Aquatic Acute 1 - Aquatic Chronic 1

Code de la classe de stockage

12 - Non Combustible Liquids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Certificats d'analyse (COA)

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Guang Zhao et al.
Chemosphere, 229, 169-180 (2019-05-12)
Although silver nanoparticles (AgNPs) are used in various commercial products, the biological effects of AgNPs on fish embryogenesis and the underlying molecular mechanisms are still poorly understood. In this study, both touch responses and neuron membrane potential were found to

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