Intrinsic driving mechanism is of particular significance to nanoscale mass delivery and device design. Stiffness gradient-driven directional motion, i.e., nanodurotaxis, provides an intrinsic driving mechanism, but an in-depth understanding of the driving force is still required. Based on molecular dynamics (MD) simulations, here we investigate the motion behavior of a graphene flake on a graphene substrate with a stiffness jump. The effects of the temperature and the stiffness configuration on the driving force are discussed in detail. We show that the driving force is almost totally contributed by the unbalanced edge force and increases with the temperature and the stiffness difference but decreases with the stiffness level. We demonstrate in particular that the shuttle behavior of the flake between two stiffness jumps on the substrate can be controlled by the working temperature and stiffness configuration of the system, and the shuttle frequency can be well predicted by an analytical model. These findings may have general implications for the design of nanodevices driven by stiffness jumps.
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August 2017
Research-Article
Mechanics of a Graphene Flake Driven by the Stiffness Jump on a Graphene Substrate
Hong Gao,
Hong Gao
Shanghai Key Laboratory of Mechanics in
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: ghgygs@126.com
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: ghgygs@126.com
Search for other works by this author on:
Hongwei Zhang,
Hongwei Zhang
State Key Laboratory of Ocean Engineering,
School of Naval Architecture, Ocean and
Civil Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: hwzhang@sjtu.edu.cn
School of Naval Architecture, Ocean and
Civil Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: hwzhang@sjtu.edu.cn
Search for other works by this author on:
Zhengrong Guo,
Zhengrong Guo
Shanghai Key Laboratory of Mechanics
in Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: zrguo@shu.edu.cn
in Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: zrguo@shu.edu.cn
Search for other works by this author on:
Tienchong Chang,
Tienchong Chang
Shanghai Key Laboratory of Mechanics in
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: tchang@staff.shu.edu.cn
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: tchang@staff.shu.edu.cn
Search for other works by this author on:
Li-Qun Chen
Li-Qun Chen
Shanghai Key Laboratory of Mechanics in
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: lqchen@staff.shu.edu.cn
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: lqchen@staff.shu.edu.cn
Search for other works by this author on:
Hong Gao
Shanghai Key Laboratory of Mechanics in
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: ghgygs@126.com
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: ghgygs@126.com
Hongwei Zhang
State Key Laboratory of Ocean Engineering,
School of Naval Architecture, Ocean and
Civil Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: hwzhang@sjtu.edu.cn
School of Naval Architecture, Ocean and
Civil Engineering,
Shanghai Jiao Tong University,
Shanghai 200240, China
e-mail: hwzhang@sjtu.edu.cn
Zhengrong Guo
Shanghai Key Laboratory of Mechanics
in Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: zrguo@shu.edu.cn
in Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: zrguo@shu.edu.cn
Tienchong Chang
Shanghai Key Laboratory of Mechanics in
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: tchang@staff.shu.edu.cn
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: tchang@staff.shu.edu.cn
Li-Qun Chen
Shanghai Key Laboratory of Mechanics in
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: lqchen@staff.shu.edu.cn
Energy Engineering,
Shanghai Institute of Applied Mathematics
and Mechanics,
Shanghai University,
Shanghai 200072, China
e-mail: lqchen@staff.shu.edu.cn
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received April 10, 2017; final manuscript received May 28, 2017; published online June 15, 2017. Editor: Yonggang Huang.
J. Appl. Mech. Aug 2017, 84(8): 081007 (6 pages)
Published Online: June 15, 2017
Article history
Received:
April 10, 2017
Revised:
May 28, 2017
Citation
Gao, H., Zhang, H., Guo, Z., Chang, T., and Chen, L. (June 15, 2017). "Mechanics of a Graphene Flake Driven by the Stiffness Jump on a Graphene Substrate." ASME. J. Appl. Mech. August 2017; 84(8): 081007. https://doi.org/10.1115/1.4036938
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