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Issue 12, 2018
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Fully printed high performance humidity sensors based on two-dimensional materials

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Abstract

Fully printed humidity sensors based on two-dimensional (2D) materials are described. Monolayer graphene oxide (GO) and few-layered black phosphorus (BP) flakes were dispersed in low boiling point solvents suitable for inkjet printing. The humidity sensors were fabricated by printing GO and BP sensing layers on printed silver nanoparticle electrodes. The electrical response of the GO and BP sensors to humidity levels ranges from 11 to 97% relative humidity, which revealed a high capacitance sensitivity of 4.45 × 104 times for the GO sensor and 5.08 × 103 times for the BP sensor at 10 Hz operation frequency. Response/recovery times of the GO and BP sensor were found to be 2.7/4.6 s and 4.7/3.0 s respectively. These sensors also showed sensitive and fast response to a proximal human fingertip, showing potential applications in contactless switching.

Graphical abstract: Fully printed high performance humidity sensors based on two-dimensional materials

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Publication details

The article was received on 31 Oct 2017, accepted on 15 Feb 2018 and first published on 15 Feb 2018


Article type: Paper
DOI: 10.1039/C7NR08115D
Citation: Nanoscale, 2018,10, 5599-5606
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    Fully printed high performance humidity sensors based on two-dimensional materials

    P. He, J. R. Brent, H. Ding, J. Yang, D. J. Lewis, P. O'Brien and B. Derby, Nanoscale, 2018, 10, 5599
    DOI: 10.1039/C7NR08115D

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