Development of in situ electrochemical scanning electron microscopy with ionic liquids as electrolytes

被引：60

作者：

Arimoto, Satoshi ^{[1
]}

Oyamatsu, Daisuke ^{[1
]}

Torimoto, Tsukasa ^{[2
,3
]}

Kuwabata, Susumu ^{[1
,3
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Appl Chem, Suita, Osaka 5650871, Japan

[2] Nagoya Univ, Grad Sch Engn, Dept Crystalline Mat Sci, Nagoya, Aichi 4648603, Japan

[3] JST, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

CHEMPHYSCHEM | 2008年 / 9卷 / 05期

关键词：

conducting materials; electron microscopy; ionic liquids; scanning electron microscopy; X-ray fluorescence analysis;

D O I：

10.1002/cphc.200700758

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report that ionic liquids (ILs) can be observed by electron microscopy without any charging of the liquid. Based on this, we present an in situ electrochemical scanning electron microscopy (in situ ECSEM) system. The key technology that enables in situ ECSEM is that charges can be removed from an IL by grounding it with a Pt wire, even if the IL is in an insulating gloss cell. As a first demonstration, we describe the redox reaction of a polypyrrole (PPy) film accompanied by changes in its thickness when it is polarized by the film-deposited Pt electrode in the IL. Further more, energy-dispersive X-ray fluorescence (EDX) analysis can be employed for the electrode polarized in the IL. The component analysis by EDX of PPy in an IL containing K+ as a marker, reveals doping of electrolyte cations into the PPy film upon the latter's reduction and dedoping of cations from the film upon oxidation.

引用

页码：763 / 767

页数：5

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