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Humidity-Dependent Structure of Surface Water on Perfluorosulfonated Ionomer Thin Film Studied by Sum Frequency Generation Spectroscopy
| Title: | Humidity-Dependent Structure of Surface Water on Perfluorosulfonated Ionomer Thin Film Studied by Sum Frequency Generation Spectroscopy |
| Authors: | Noguchi, Hidenori Browse this author →KAKEN DB | | Taneda, Kento Browse this author | | Minowa, Hiroshi Browse this author | | Naohara, Hideo Browse this author | | Uosaki, Kohei Browse this author →KAKEN DB |
| Issue Date: | 11-Mar-2010 |
| Publisher: | American Chemical Society |
| Journal Title: | Journal of Physical Chemistry C |
| Volume: | 114 |
| Issue: | 9 |
| Start Page: | 3958 |
| End Page: | 3961 |
| Publisher DOI: | 10.1021/jp907194k |
| Abstract: | Humidity-dependent water structure on the Nafion thin film surface was determined at room temperature by using sum frequency generation spectroscopy (SFG). When the Nafion thin film was exposed to a low relative humidity (RH) environment, a peak at 3720 cm^[-1] due to the "dangling OH" or "free OH" of water molecules and a peak centered around 3600 cm^[-1], which was assigned to be due to water molecules interacting with sulfonate groups of the Nafion surface, were observed. The intensities of these peaks increased as RH was increased. A broad peak centered around 3200-3300 cm^[-1] due to water adsorbed on hydrophobic, i.e., fluorocarbon, sites of Nafion was observed when the Nafion thin film was exposed to a high RH environment (RH > 60%). The behavior of surface water is compared with that of water in bulk Nafion. |
| Type: | article |
| URI: | http://hdl.handle.net/2115/50206 |
| Appears in Collections: | 理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 魚崎 浩平
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