The formation of Ag clusters on silica colloidal nanoparticles was achieved by photoreduction of silver ions with visible laser irradiation. A mechanism of this process was proposed by observing the plasmon resonance bands of the silver clusters in UV–visible absorption spectroscopy. These Ag/SiO2 colloids are SERS-active and can be used to detect products that could be formed by heterogeneous catalytic reactions of ligands adsorbed on the colloidal surface.
SERS-active Ag/SiO2 colloids: Photoreduction mechanism of the silver ions and catalytic activity of the colloidal nanoparticles / M. MUNIZ-MIRANDA. - In: JOURNAL OF RAMAN SPECTROSCOPY. - ISSN 0377-0486. - STAMPA. - 35:(2004), pp. 839-842. [10.1002/jrs.1220]
SERS-active Ag/SiO2 colloids: Photoreduction mechanism of the silver ions and catalytic activity of the colloidal nanoparticles
MUNIZ-MIRANDA, MAURIZIO
2004
Abstract
The formation of Ag clusters on silica colloidal nanoparticles was achieved by photoreduction of silver ions with visible laser irradiation. A mechanism of this process was proposed by observing the plasmon resonance bands of the silver clusters in UV–visible absorption spectroscopy. These Ag/SiO2 colloids are SERS-active and can be used to detect products that could be formed by heterogeneous catalytic reactions of ligands adsorbed on the colloidal surface.File | Dimensione | Formato | |
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