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; B. Derby

doi:10.1039/C7NR08115D

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Fully printed high performance humidity sensors based on two-dimensional materials†

P. He,‡^a J. R. Brent,^a H. Ding,

^a J. Yang,^a D. J. Lewis,

^a P. O'Brien^b and B. Derby

*^a

Author affiliations

* Corresponding authors

^a School of Materials, University of Manchester, Oxford Road, UK
E-mail: Brian.Derby@manchester.ac.uk

^b School of Chemistry, University of Manchester, Oxford Road, UK

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.

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Article information

DOI: https://doi.org/10.1039/C7NR08115D
Article type: Paper
Submitted: 31 Oct 2017
Accepted: 15 Feb 2018
First published: 15 Feb 2018

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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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Fully printed high performance humidity sensors based on two-dimensional materials†

Abstract

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

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