Journal
NANOSCALE HORIZONS
Volume 3, Issue 5, Pages 525-531Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nh00052b
Keywords
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Funding
- Natural Science Foundation of Guangdong [2016A030313059]
- Science and Technology plan project of Guangdong [2017A010101018]
- Science and Technology plan project of Shenzhen [JCYJ20160307111047701, JCYJ20160226192754225, JCYJ20160307145209361, JCYJ2016-0307142444674]
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Multi-layer black phosphorus (m -BP) has been successfully incorporated in zinc oxide (ZnO) hollow spheres, thus forming heterostructured 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.
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