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Ultraviolet-photon exposure stimulates negative current conductivity in amorphous ice below 50 K
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| Title: | Ultraviolet-photon exposure stimulates negative current conductivity in amorphous ice below 50 K |
| Authors: | Watanabe, N. Browse this author →KAKEN DB | | Sameera, W. M. C. Browse this author →KAKEN DB | | Hidaka, H. Browse this author | | Miyazaki, A. Browse this author | | Kouchi, A. Browse this author →KAKEN DB |
| Issue Date: | 16-Dec-2019 |
| Publisher: | Elsevier |
| Journal Title: | Chemical physics letters |
| Volume: | 737 |
| Start Page: | 136820 |
| Publisher DOI: | 10.1016/j.cplett.2019.136820 |
| Abstract: | Water ice is known to carry positive charge via transfer of excess protons through a hydrogen-bonded system. In contrast, constant negative charge conductivity in ice has neither been confirmed experimentally nor theoretically. Here, we report that ultraviolet-photon irradiation stimulates negative current conductivity in amorphous ice at temperatures below 50 K, where hitherto known proton transfer from the surface through the bulk ice is inhibited. Quantum chemical calculations imply that the negative current conductivity results from almost barrier-less proton-hole transfer processes that neither requires intrinsic defects, doped species, nor reorientation of H2O molecules in ice. |
| Rights: | ©2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/83556 |
| Appears in Collections: | 低温科学研究所 (Institute of Low Temperature Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 渡部 直樹
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