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Green photocatalytic synthesis of stable Au and Ag nanoparticles

2009; Royal Society of Chemistry; Volume: 11; Issue: 11 Linguagem: Inglês

10.1039/b917203n

1463-9270

Pedro Quaresma, Leonor Soares, Lívia Barbosa Contar, Adelaide Miranda, Inês Osório, P.A. Carvalho, Ricardo Franco, Eulália Pereira,

Nanocluster Synthesis and Applications

Stable Au and Ag nanoparticles with diameter 5–10 nanometers were synthesized in water at pH 7 and at room temperature by a novel green photocatalytic method. The method features very low energy consumption and non-toxic reagents with high yields of concentrated nanoparticles in aqueous solution obtained in less than four minutes. The nanoparticles so obtained are highly monodispersed, thus avoiding the use of further time consuming and cumbersome purification procedures. In addition, the capping agent is readily exchanged by thiols, providing a facile way of functionalization for biological applications.