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Enthalpy-Driven Three-State Switching of a Superhydrophilic/Superhydrophobic Surface

Authors

  • Shutao Wang Dr.,

    1. Center of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P.R. China, Fax: (+86) 10-8262-7566
    2. Graduate School of Chinese Academic of Sciences, Beijing 100864, P.R. China
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  • Huajie Liu,

    1. National Center for NanoScience and Technology, No. 2 North Street, Zhongguancun, Beijing 100080, P.R. China, Fax: (+86) 10-6265-2116
    2. Graduate School of Chinese Academic of Sciences, Beijing 100864, P.R. China
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  • Dongsheng Liu Prof.,

    1. National Center for NanoScience and Technology, No. 2 North Street, Zhongguancun, Beijing 100080, P.R. China, Fax: (+86) 10-6265-2116
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  • Xinyong Ma Dr.,

    1. Center of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P.R. China, Fax: (+86) 10-8262-7566
    2. Graduate School of Chinese Academic of Sciences, Beijing 100864, P.R. China
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  • Xiaohong Fang Prof.,

    1. Center of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P.R. China, Fax: (+86) 10-8262-7566
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  • Lei Jiang Prof.

    1. Center of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P.R. China, Fax: (+86) 10-8262-7566
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  • The authors thank the State Key Project Fundamental Research (G1999064504), the Special Research Foundation of the National Natural Science Foundation of China (29992530, 20125102, 20573027), the Science 100 Program of CAS, and the MOST 973 project (grant No. 2005CB724701) for financial support. Moreover, the authors thank Prof. Zhenghe Tong and Prof. Qi Wu for their inspired discussions and constructive suggestions.

Abstract

original image

Wet, wet, wet: A responsive surface is presented that can switch between stable superhydrophilic, metastable superhydrophobic, and stable superhydrophobic states by an enthalpy-driven process (see picture). This macroscopic phenomenon of surface wettability originates from the coordinative effect of the collective nanoscale motion of DNA nanodevices and the surface microstructure.

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