A novel method to prepare Au nanocage@SiO2 nanoparticle

doi:10.1088/1674-1056/22/12/126102

Abstract Gold (Au) nanocage@SiO₂ nanoparticles are prepared by a novel approach. The silver (Ag) nanocube@SiO₂ structure is synthetized firstly. Next, the method of etching a SiO₂ shell by boiling water is adopted to change the penetration rate of AuCl₄^- through the SiO₂ shell. AuCl₄^- can penetrate through silica shells of different thickness values to react with the Ag nanocube core by changing the incubation time. The surface plasma resonance (SPR) peak of synthetic Au nanocage@SiO₂ can be easily tuned into the near-infrared region. Besides, CdTeS quantum dots (QDs) are successfully connected to the surface of Au nanocage@SiO₂, which testifies that the incubation process does not change the property of silica.

Keywords: Ag nanocube Au nanocage silica nanostructure

Received: 20 March 2013
Revised: 18 April 2013
Accepted manuscript online:

PACS:	61.46.-w	(Structure of nanoscale materials)
	78.40.-q	(Absorption and reflection spectra: visible and ultraviolet)
	78.67.Bf	(Nanocrystals, nanoparticles, and nanoclusters)
	78.67.Sc	(Nanoaggregates; nanocomposites)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 51272246 and 81172082) and the Fundamental Research Funds for the Central Universities, China (Grant No. 2030000001).

Corresponding Authors: Zhu Li-Xin, Xu Xiao-Liang
E-mail: lx-zhu@163.com;xlxu@ustc.edu.cn

Cite this article:

Jiang Tong-Tong (蒋童童), Yin Nai-Qiang (尹乃强), Liu Ling (刘玲), Lei Jie-Mei (雷洁梅), Zhu Li-Xin (朱立新), Xu Xiao-Liang (许小亮) A novel method to prepare Au nanocage@SiO₂ nanoparticle 2013 Chin. Phys. B 22 126102

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A novel method to prepare Au nanocage@SiO2 nanoparticle

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A novel method to prepare Au nanocage@SiO₂ nanoparticle