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Potential-induced switching of electrical contact by controlling droplet shapes at hydrophilic/hydrophobic interfaces |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Beijing Key Lab of New Energy Materials and Technologies, Beijing 100083, China;3. Department of Chemical and Biomolecular Engineering, The University of Akron, OH 44325, United States;1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, PR China;2. Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, PR China;1. Key Laboratory for Green Chemical Process of Ministry of Education and School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Xiongchu Street, Wuhan, 430073, PR China;2. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, PR China |
| Abstract: | Asymmetrical deformation of an aqueous electrolyte droplet bridging two bipyridinium-modified Au-electrodes is achieved upon the application of voltages resulting in the selective reduction and oxidation of the bipyridinium units on the two electrodes. The different contact angles at the right and left sides of the droplet originate from the electrochemically controlled changes of the wetting properties of the modified electrodes. The reversible and repeatable formation of an electrolytic contact between a side Pt-wire electrode and the respective bottom Au-electrode is controlled by the voltage applied between the two bottom Au-electrodes. |
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