検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Water distribution in Nafion thin films on hydrophilic and hydrophobic carbon substrates

親水性と疎水性カーボン基板上のナフイオン薄膜中の水の分布

伊藤 華苗  ; 原田 雅史*; 山田 悟史*; 工藤 憲治*; 青木 裕之 ; 金谷 利治*

Ito, Kanae; Harada, Masashi*; Yamada, Norifumi*; Kudo, Kenji*; Aoki, Hiroyuki; Kanaya, Toshiji*

We performed H$$_{2}$$O and D$$_{2}$$O double contrast neutron reflectivity measurements on $$sim$$25-nm-thick Nafion thin films on hydrophilic and hydrophobic carbon in water and 80% relative humidity vapor to investigate the depth profile of the water and Nafion distribution. We found a dense Nafion layer at the air or water interface regardless of the carbon hydrophilicity. On the other hand, a water-rich Nafion dense layer was observed at the carbon interface only for hydrophilic carbon. The double contrast measurements provided quantitative information about the depth profile but simultaneously indicated that the sum of the volume occupancies of water and Nafion in the film was less than unity. We assessed the problem based on two possibilities: voids in the film or "residual water", which cannot be exchanged or is difficult to exchange with water outside.

Access

:

- Accesses

InCites™

:

パーセンタイル:21.55

分野:Chemistry, Multidisciplinary

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.