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Issue 12, 2013
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Highly selective gas sensor arrays based on thermally reduced graphene oxide

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Abstract

The electrical properties of reduced graphene oxide (rGO) have been previously shown to be very sensitive to surface adsorbates, thus making rGO a very promising platform for highly sensitive gas sensors. However, poor selectivity of rGO-based gas sensors remains a major problem for their practical use. In this paper, we address the selectivity problem by employing an array of rGO-based integrated sensors instead of focusing on the performance of a single sensing element. Each rGO-based device in such an array has a unique sensor response due to the irregular structure of rGO films at different levels of organization, ranging from nanoscale to macroscale. The resulting rGO-based gas sensing system could reliably recognize analytes of nearly the same chemical nature. In our experiments rGO-based sensor arrays demonstrated a high selectivity that was sufficient to discriminate between different alcohols, such as methanol, ethanol and isopropanol, at a 100% success rate. We also discuss a possible sensing mechanism that provides the basis for analyte differentiation.

Graphical abstract: Highly selective gas sensor arrays based on thermally reduced graphene oxide

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Publication details

The article was received on 11 Feb 2013, accepted on 10 Apr 2013 and first published on 12 Apr 2013


Article type: Paper
DOI: 10.1039/C3NR00747B
Nanoscale, 2013,5, 5426-5434

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    Highly selective gas sensor arrays based on thermally reduced graphene oxide

    A. Lipatov, A. Varezhnikov, P. Wilson, V. Sysoev, A. Kolmakov and A. Sinitskii, Nanoscale, 2013, 5, 5426
    DOI: 10.1039/C3NR00747B

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