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Ultrahigh sensitivity and layer-dependent sensing performance of phosphorene-based gas sensors

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Cui, Shumao, Pu, Haihui, Wells, Spencer A., Wen, Zhenhai, Mao, Shun, Chang, Jingbo, Hersam, Mark C., Chen, Junhong·2015·Nature Communications

Abstract

Two-dimensional (2D) layered materials have attracted significant attention for device applications because of their unique structures and outstanding properties. Here, a field-effect transistor (FET) sensor device is fabricated based on 2D phosphorene nanosheets (PNSs). The PNS sensor exhibits an ultrahigh sensitivity to NO 2 in dry air and the sensitivity is dependent on its thickness. A maximum response is observed for 4.8-nm-thick PNS, with a sensitivity up to 190% at 20 parts per billion (p.p.b.) at room temperature. First-principles calculations combined with the statistical thermodynamics modelling predict that the adsorption density is ∼10 15 cm−2 for the 4.8-nm-thick PNS when exposed to 20 p.p.b. NO 2 at 300 K. Our sensitivity modelling further suggests that the dependence of sensitivity on the PNS thickness is dictated by the band gap for thinner sheets (<10 nm) and by the effective thickness on gas adsorption for thicker sheets (>10 nm).

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Metadata

Authors
Cui, S., Pu, H., Wells, S. A., Wen, Z., Mao, S., Chang, J., Hersam, M. C., & Chen, J.
Venue
Nature Communications
Published
2015-10-21
Volume
6
Issue
1
Pages
8632-8632
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2180579652
Cited by
763
References
3
FWCI
29.19
Type
journal article
Language
en
Open access
gold

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CoChat. (2026). Citation check: Ultrahigh sensitivity and layer-dependent sensing performance of phosphorene-based gas sensors. https://app.cochat.ai/papers/10.1038/ncomms9632
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Cui, S., Pu, H., Wells, S. A., Wen, Z., Mao, S., Chang, J., Hersam, M. C., & Chen, J. (2015). Ultrahigh sensitivity and layer-dependent sensing performance of phosphorene-based gas sensors. Nature Communications. https://doi.org/10.1038/ncomms9632

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