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Electrowetting of Hydrofluoroether Liquid Droplet at a Gold Electrode/Water Interface: Significance of Lower Adhesion Energy and Static Friction Energy
http://hdl.handle.net/10069/00041213
http://hdl.handle.net/10069/00041213f40a3a24-5c06-4684-bd69-393cd8d8d8f8
名前 / ファイル | ライセンス | アクション |
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Langmuir36_9685.pdf (1.2 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-02-02 | |||||
タイトル | ||||||
タイトル | Electrowetting of Hydrofluoroether Liquid Droplet at a Gold Electrode/Water Interface: Significance of Lower Adhesion Energy and Static Friction Energy | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Electrowetting | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Hydrofluoroether | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Interface | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Au(1 1 1) | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Surface tension | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Static friction energy | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Adhesion en-ergy | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Morooka, Tetsuro
× Morooka, Tetsuro× Sagara, Takamasa |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | We explored the electrowetting behavior of a hydrofluoroester solvent, Novec 7100 (Novec), as a liquid droplet on a Au(111) electrode in water (0.05 M KClO4). Comparison with the electrowetting of hexadecane (HD) highlighted the significance of the lower adhesion energy and static friction energy of Novec than those of HD. The electrode potential-dependent contact angle θ of a Novec droplet showed little hysteresis. When potentials were set by means of potential steps, a Novec droplet increased its θ at more positive potentials than the potential of zero charge (pzc) of the Au(111) electrode. We found that the key factor of the electrowetting behavior for Novec is its low adhesion energy and static friction energy. The static friction energy of the oils to the Au(111) electrode surface was evaluated by a comparative analysis of the potential dependence of the interfacial tension at the solid/water interface, ΔγS/W–E curve, calculated from electrochemical surface charge data and the experimental cos θ–E curve: 2.6 mN/m for HD and 0.95 mN/m for Novec. When Br– was added in the aqueous solution to allow its adsorption on the Au surface surrounding a Novec droplet, the potential of maximum cos θ was shifted to negative. Overall, although the Novec droplet showed a narrower range of θ change than a HD droplet, the Novec droplet seldom got stuck to the surface as far as potential step was used, reflecting the narrower plateau region of θ near the pzc. Also, the specific adsorption of a coexistent anion was a significant factor of θ. This work has featured the significance of a slippy droplet on an electrode surface, giving an impact on the technology of microfluid transportation control by electric potentials. | |||||
書誌情報 |
Langmuir 巻 36, 号 33, p. 9685-9692, 発行日 2020-07-27 |
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出版者 | ||||||
出版者 | American Chemical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0743-7463 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1021/acs.langmuir.0c00829 | |||||
権利 | ||||||
権利情報 | ©2020, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Langmuir, copyright (c) American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.langmuir.0c00829 | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Langmuir, 36(33), pp.9685–9692; 2020 |