Quasiquenching Size Effects in Gold Nanoclusters Embedded in Silica Matrix
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CONTRIBUTORS:
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JOURNAL:
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Chem. Phy. Lett .,
370(1-2),
254 -
260.
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YEAR:
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2003
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PUB TYPE:
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Journal Article
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SUBJECT(S):
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surface plasmon resonance, low frequency Raman, acoustic phonon confinement, Au nanocluster, ion implantation
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DISCIPLINE:
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Physics
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HTTP:
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http://doi:10.1016/S0009-2614(03)00104-0
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LANGUAGE:
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English
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PUB ID:
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103-445-502
(Last edited on
2008/10/13 20:08:32 GMT-6)
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SPONSOR(S):
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ABSTRACT:
The surface plasmon energy of gold clusters formed by Arū ion beam mixing of Au/silica is investigated for the size
effect. The redshift with decreasing cluster size is assigned to the 'spillout' effect in small clusters (<5 nm). Core-electron contribution to the metal dielectric function is mainly responsible for the blueshift with decreasing cluster size (quenching of the size effect) in case of bigger cluster size (>5 nm), assisted with annealing treatment. The competition between 'spillout' effect and the frequency dependence of interband dielectric function leads to a quasiquenching of the
size effects in the optical response.
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STATISTICS
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