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Optical emission studies in Au/Ag nanoparticles

A Longo1, G P Pepe2,7, G Carotenuto3, A Ruotolo2, S De Nicola4, V I Belotelov5 and A K Zvezdin6

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Photoluminescence spectra of Au/Ag nanoparticles have been investigated experimentally. The clusters were obtained inside an amorphous polymeric matrix by thermal simultaneous decomposition of both gold and silver mercaptides. The optical characterization in terms of photoluminescence showed a red shift of position of the emission peak as a function of the Ag mercaptide concentration. The red shift is qualitatively explained in terms of the Jellium model along with the quantum size effects.


PACS

78.67.Bf Nanocrystals and nanoparticles

78.55.-m Photoluminescence, properties and materials

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 36 (12 September 2007)

Received 18 April 2007, in final form 10 July 2007

Published 10 August 2007



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