Preparación de nanopartículas de plata en ausencia de polimeros estabilizantes
AUTOR(ES)
Sifontes, Ángela B., Melo, Luis, Maza, Carlos, Mendes, Juan J., Mediavilla, Marta, Brito, Joaquín L., Zoltan, Tamara, Albornoz, Alberto
FONTE
Química Nova
DATA DE PUBLICAÇÃO
2010
RESUMO
Silver nanoparticles (AgNPs) were prepared by means of the polyol method in the absence of stabilizing polymers. To accomplish this objective, AgNO3 was added to ethylene glycol in the presence of NaOH (1 mol.L-1), the suspension formed was irradiated with a microwave source for 60 seconds at a power of 465 watts. It was found that under these conditions AgNPs of sizes between 4-18 nm are formed. Also the results indicate that part of the ethylene glycol is oxidized to carbonyl compounds that reduce the Ag+. These organic compounds are adsorbed on the surfaces of AgNPs, forming a protective film that prevents their aggregation.
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