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Zinc oxide–black phosphorus composites for ultrasensitive nitrogen dioxide sensing

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Abstract

Multi-layer black phosphorus (m-BP) has been successfully incorporated in zinc oxide (ZnO) hollow spheres, thus forming hetero-structured ZnO–BP composites; a study performed on their properties reveals that the BP environmental stability can be significantly enhanced by the introduction of ZnO, and the sensors based on ZnO–BP composites exhibit high response, fast response behavior, outstanding selectivity, and ultralow detection limit of 1 ppb towards NO2 gas molecules. The ultrasensitive sensing performance is suggested to be due to the large surface area, excellent carrier mobility, and enhanced charge transfer of ZnO–BP in the presence of BP. Moreover, the mechanism of NO2 sensing with ZnO–BP is confirmed by the calculations obtained from the first-principle studies.

Graphical abstract: Zinc oxide–black phosphorus composites for ultrasensitive nitrogen dioxide sensing

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Publication details

The article was received on 08 Mar 2018, accepted on 15 May 2018 and first published on 16 May 2018


Article type: Communication
DOI: 10.1039/C8NH00052B
Citation: Nanoscale Horiz., 2018, Advance Article
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    Zinc oxide–black phosphorus composites for ultrasensitive nitrogen dioxide sensing

    Q. Li, Y. Cen, J. Huang, X. Li, H. Zhang, Y. Geng, B. I. Yakobson, Y. Du and X. Tian, Nanoscale Horiz., 2018, Advance Article , DOI: 10.1039/C8NH00052B

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