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A charge-driven molecular flip-flop

Published online by Cambridge University Press:  26 February 2013

Yu Wang ,
Yanjiao Zhao  and
Jiping Huang
Yu Wang*
Affiliation:
Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, P.R. China Department of Physics, Zhejiang Agriculture and Forestry University, Linan 311300, P.R. China
Yanjiao Zhao*
Affiliation:
Advanced Materials Laboratory, Fudan University, Shanghai 200438, P.R. China
Jiping Huang*
Affiliation:
Department of Physics and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, P.R. China
*
ae-mail: yuwang79@gmail.com
be-mail: zhaoyanjiao@fudan.edu.cn
ce-mail: jphuang@fudan.edu.cn
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Abstract

Using molecular dynamics simulations, we exploit a charge-driven flip-flop that is composed several water molecules confined in a single-walled carbon nanotube. The flip-flop has two stable states and can be used to store state information. It can toggle between the two states within 2.5–3.5 ps (286 GHz–400 GHz). We reveal that the underlying mechanism is dominated by the interaction between the water molecules and nonuniform electric field generated by point charges. Namely, each water molecule tends to maintain its lowest electric energy by moving toward the location with the highest field strength. This flip-flop may be of value for molecular computing.

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 61 , Issue 3 , March 2013 , 30401
Copyright
© EDP Sciences, 2013

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