Effect of water vapor on electrical properties of individual reduced graphene oxide sheets

Inhwa Jung, Dmitriy Dikin, Sungjin Park, Weiwei Cai, Steven L Mielke, Rodney S. Ruoff

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237 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)20264-20268
Number of pages5
JournalJournal of Physical Chemistry C
Volume112
Issue number51
DOIs
StatePublished - Dec 1 2008

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    Jung, I., Dikin, D., Park, S., Cai, W., Mielke, S. L., & Ruoff, R. S. (2008). Effect of water vapor on electrical properties of individual reduced graphene oxide sheets. Journal of Physical Chemistry C, 112(51), 20264-20268. https://doi.org/10.1021/jp807525d