Journal article
Thermally reduced graphene oxide showing n- to p-type electrical response inversion with water adsorption
AA Haidry, Z Wang, Q Fatima, A Zavabeti, L Xie, H Zhu, Z Li
Applied Surface Science | Elsevier | Published : 2020
Abstract
Graphene oxide (GO) is regarded as one of the potential candidates for gas and humidity sensor applications owing to its excellent water adsorption capabilities. However, there is a lack of understanding the response of GO to humidity. Some authors believe the water adsorption leads to p-type response while other think it to be n-type. The present work demonstrates the mechanism of water adsorption and n- to p-type response inversion of GO to humidity. The GO suspension was synthesised by modified Hummers’ method and then drop-casted onto the substrates having already patterned gold interdigital electrodes (IDE). The sensors can detect wide humidity range (5–95 %RH) with a low voltage 0.1 V ..
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Awarded by Natural Science Foundation of Jiangsu Province
Awarded by National Natural Science Foundation of China
Awarded by Central University Basic Scientific Research Business Expenses Special Funds
Awarded by Postgraduate Research and Practice Innovation Program of Jiangsu Province
Funding Acknowledgements
We thank the Funding "Natural Science Foundation of Jiangsu Province" (BK20170795), "National Natural Science Foundation of China" (51850410506) and "Central University Basic Scientific Research Business Expenses Special Funds" (NG2020002) for providing major financial support. This work was also supported "Postgraduate Research and Practice Innovation Program of Jiangsu Province" (KYCX18_0281).