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Colloidal Silver Nanoparticle Induced Photoluminescence Quench on the Surface Functionalized Planar Si

Published online by Cambridge University Press:  26 February 2011

Li-Lin Tay ,
Nelson Rowell  and
Rabah Boukherroub
Li-Lin Tay
Affiliation:
[email protected], National Research Council, Building M-50, 1200 Montreal Road, Ottawa, Ontario, K1A 0R6, Canada
Nelson Rowell
Affiliation:
[email protected], National Research Council, Canada
Rabah Boukherroub
Affiliation:
[email protected], France
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Abstract

The photoluminescence (PL) intensity of undecylenic acid surface functionalized planar Si (001) was investigated in the presence of colloidal Ag nanoparticles. The acid passivated Si surface has a weak PL at 1125 nm. Upon exposure to a Ag nanoparticle sol, the PL quenched exponentially with a characteristic decay time of ∼ 18 minutes. It is known that the metal mediated charge-transfer process provides a pathway for energy decay and leads to a quenching of luminescence in light emitting material. An in-situ study of the surface passivated Si revealed that the Ag nanoparticle was likely to have come into contact or was sited close enough to the semiconductor surface through adsorption to cause effective PL quenching.

Keywords

AgluminescenceSi
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 901: Symposium R – Assembly at the Nanoscale – Toward Functional Nanostructured Materials , 2005 , 0901-Ra16-12-Rb16-12
Copyright
Copyright © Materials Research Society 2006

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References

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