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Preparation and enhanced off-resonance optical nonlinearities of CdS-capped gold nanoparticles embedded in BaTiO3 thin films

Published online by Cambridge University Press:  31 January 2011

Yong Yang ,
Jianlin Shi ,
Hangrong Chen ,
Shugang Dai ,
Weiming Huang  and
Ye Liu
Yong Yang
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Jianlin Shi*
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Hangrong Chen
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Shugang Dai
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Weiming Huang
Affiliation:
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People's Republic of China
Ye Liu
Affiliation:
Physics Department, National Key Laboratory of Applied Surface Physics, Fudan University, Shanghai, People's Republic of China
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

A simple approach has been developed for the synthesis of Au@CdS core-shell nanoparticles by a direct self-assembling process. Stable Au@CdS composite colloids were prepared by thiourea, as a double-functional reagent that acted as the linkage agent between Cd2+ ions and gold nanoparticles. The CdS-capped gold composite nanoparticles were successfully integrated into BaTiO3 films. A significant enhancement of third-order nonlinear optical susceptibility in the Au@CdS nanoparticles with core-shell structure is reported. To compare the effect of enhanced nonlinear response, single gold or CdS nanoparticles embedded in BaTiO3 films were also prepared.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 11 , November 2002 , pp. 2802 - 2808
Copyright
Copyright © Materials Research Society 2002

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