NO2 and Humidity Sensing Characteristics of Few-layer Graphene

Details NO2 and Humidity Sensing Characteristics of Few-layer Graphene NO2 and Humidity Sensing Characteristics of Few-layer Graphene

2009-05-18

arxiv.org/abs/0905.2852v1

Physics

Chemical Physics

19 pages, 7 figures

Scientific paper

Sensing characteristics of few-layer graphenes for NO2 and humidity have been investigated with graphene samples prepared by the thermal exfoliation of graphitic oxide (EG), conversion of nanodiamond (DG) and arc-discharge of graphite in hydrogen (HG). The sensitivity for NO2 is found to be highest with DG. Nitrogen-doped HG (n-type) shows increased sensitivity for NO2 compared to pure HG. The highest sensitivity for humidity is observed with HG. The sensing characteristics of graphene have been examined for different aliphatic alcohols and the sensitivity is found to vary with the chain length and branching.

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