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Journal of Nanomaterials
Volume 2014 (2014), Article ID 989672, 6 pages
http://dx.doi.org/10.1155/2014/989672
Research Article

Thickness-Dependent Strain Effect on the Deformation of the Graphene-Encapsulated Au Nanoparticles

1Institute of Microelectronics and Information Technology, Wuhan University, Wuhan, Hubei 430072, China
2Laboratory of Nanomaterials and Sensors, School of Physics, Electronics and Communication, Jiangxi Normal University, Nanchang, Jiangxi 330022, China

Received 29 November 2013; Accepted 23 December 2013; Published 9 January 2014

Academic Editor: Wen Lei

Copyright © 2014 Shuangli Ye et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The strain effect on graphene-encapsulated Au nanoparticles is investigated. A finite-element calculation is performed to simulate the strain distribution and morphology of the monolayer and multilayer graphene-encapsulated Au nanoparticles, respectively. It can be found that the inhomogeneous strain and deformation are enhanced with the increasing shrinkage of the graphene shell. Moreover, the strain distribution and deformation are very sensitive to the layer number of the graphene shell. Especially, the inhomogeneous strain at the interface between the graphene shell and encapsulated Au nanoparticles is strongly tuned by the graphene thickness. For the mono- and bilayer graphene-encapsulated Au nanoparticles, the dramatic shape transformation can be observed. However, with increasing the graphene thickness further, there is hardly deformation for the encapsulated Au nanoparticles. These simulated results indicate that the strain and deformation can be designed by the graphene layer thickness, which provides an opportunity to engineer the structure and morphology of the graphene-encapsulated nanoparticles.
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