Effect of Water Vapor on Electrical Properties of Individual Reduced Graphene Oxide Sheets

被引：258

作者：

Jung, Inhwa ^{[1
]}

Dikin, Dmitriy ^{[2
]}

Park, Sungjin ^{[1
]}

Cai, Weiwei ^{[1
]}

Mielke, Steven L. ^{[3
]}

Ruoff, Rodney S. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Mech Engn, Austin, TX 78712 USA

[2] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA

[3] Univ Minnesota, Dept Chem, Minneapolis, MN 55455 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 51期

关键词：

D O I：

10.1021/jp807525d

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：

The electrical conductivity and gas-sensing characteristics of individual sheets of partially reduced graphene oxide are studied, and the results display a strong dependence on the chosen reduction method. Three reduction procedures are considered here: thermal, chemical, and a combined chemical/thermal approach. Samples treated by chemical/thermal reduction display the highest conductivity whereas thermally reduced samples display the fastest gas-sensing response times. The chemo-resistive response to water vapor adsorption is well fit by a linear driving force model. The conductivity upon exposure to water vapor and measured as a function of the gated electric field displays significant hysteresis. These results illustrate how the chemical structure of graphene oxide may be tailored to optimize specific properties for applications such as field effect devices and gas sensors.

引用

页码：20264 / 20268

页数：5

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