Effects of Ag Particles’ Shape in Ag-SiO2 Composite Films on Surface Resonance Absorption Properties

doi:10.3724/SP.J.1077.2008.00351

Journal of Inorganic Materials

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Effects of Ag Particles’ Shape in Ag-SiO₂ Composite Films on Surface Resonance Absorption Properties

ZHAO Ya-Li^1,2, XU Xiao-Liang^1,2, MING Hai²

1. Structure Research Laboratory, Chinese Academy of Sciences, Hefei 230026, China; 2. Department Physics, University of Science and technology of China, Hefei 230026, China

Received:2007-03-22 Revised:2007-05-11 Published:2008-03-20 Online:2008-03-20

Abstract

Abstract: Ag/SiO₂ multilayer thin films were prepared by RF magnetron sputtering. The Ag nanoparticles diffuse towards and mostly assemble near the surface of the Ag-SiO₂ films via rapid thermal treatment. Ag nanoparticles with different shapes can be obtained by changing the thickness of Ag and SiO₂ layers. It is found that the Ag particles with sharper edges and wider terrace between steps have more electrons at Fermi level. Accordingly, the intensity of resonance absorption is obviously enhanced.

Key words: resonance absorption, surface state, energy of surface state, Fermi leve

CLC Number:

TB34
TB43

ZHAO Ya-Li,XU Xiao-Liang,MING Hai. Effects of Ag Particles’ Shape in Ag-SiO₂ Composite Films on Surface Resonance Absorption Properties[J]. Journal of Inorganic Materials, DOI: 10.3724/SP.J.1077.2008.00351.

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Effects of Ag Particles’ Shape in Ag-SiO₂ Composite Films on Surface Resonance Absorption Properties

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