Silica-covered Au nanoresonators for fluorescence modulating of a graphene quantum dot

doi:10.1088/1674-1056/23/9/097803

Abstract We synthesize Au@SiO₂ composite particles with a core-shell structure, and utilize the Au@SiO₂ nanoparticles to modulate the fluorescence emission of the graphene quantum dot (GQD) through varying the silica shell thickness. The silica shell thickness can be easily controlled by varying the coating time. After silica coating, we investigate the influence of the silica thickness on the fluorescence emission of the GQD and find that the fluorescence property of the GQD can be changed as expected by varying the thickness of the silica shell. We propose an optimized coating time for the silica shell under the interaction of fluorescence quenching and enhancement.

Keywords: graphene quantum dot fluorescence nanoparticles

Received: 18 January 2014
Revised: 10 March 2014
Accepted manuscript online:

PACS:	78.67.Wj	(Optical properties of graphene)
	73.63.Kv	(Quantum dots)
	87.64.kv	(Fluorescence)
	78.67.Bf	(Nanocrystals, nanoparticles, and nanoclusters)

Fund: Project supported by the National Basic Research Program of China (Grant Nos. 2011CB932700 and 2011CB932703), the National Natural Science Foundation of China (Grant Nos. 61378073, 61335006, 91123025, and 61077044), and the Beijing Natural Science Foundation, China (Grant No. 4132031).

Corresponding Authors: He Da-Wei, Wang Wen-Shuo
E-mail: dwhe@bjtu.edu.cn;wangwinsome@gmail.com

Cite this article:

Wang Su-Feng (王素凤), He Da-Wei (何大伟), Wang Yong-Sheng (王永生), Hu Yin (胡音), Duan Jia-Hua (段嘉华), Fu Ming (富鸣), Wang Wen-Shuo (王闻硕) Silica-covered Au nanoresonators for fluorescence modulating of a graphene quantum dot 2014 Chin. Phys. B 23 097803

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Silica-covered Au nanoresonators for fluorescence modulating of a graphene quantum dot

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