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Visualization of Ion Channels in Membranes using Electrochemical Strain Microscopy

Authors :
Kim, Suran
Oh, Chungik
Kim, Hongjun
Shi, Yuanyuan
Lanza, Mario
No, Kwangsoo
Hong, Seungbum
Publication Year :
2019
Publisher :
arXiv, 2019.

Abstract

Polymer composite electrolytes of Nafion and phosphotungstic acid (PWA) are fabricated and analyzed using electrochemical strain microscopy (ESM) and conductive atomic force microscopy (C-AFM) to visualize hydrophilic ion channels near the surface, which are composed of water and sulfonic acid groups. The results indicate that the fibrillar objects in ESM image, without significant changes in topography, are hydrophilic ion channels and additional ion channels formed by interaction between PWA and sulfonic groups in Nafion. In this study, the buried ion channels lying under the surface are probed as well as the inlet and outlet of the channels on the surface through combined use of ESM and C-AFM. The results further enhance the understanding of ionic conduction in composite polymer electrolytes in various fields.<br />Comment: 13 pages, 3 figures

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....f597f1a6c86ab04b8e3b1c4cd0b3a92e
Full Text :
https://doi.org/10.48550/arxiv.1909.00789