Semiconductor Physics, Quantum Electronics & Optoelectronics, 22 (1), P. 98-103 (2019).
DOI: https://doi.org/10.15407/spqeo22.01.098
Reduced graphene oxide obtained using the spray pyrolysis technique for gas sensing
1V. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine, Kyiv, Ukraine
Abstract. Graphene oxide films were formed using the ultrasonic spray coating method and studied with micro-Raman spectroscopy, atomic force microscopy, and electrical dynamic response of resistance measurements. Effect of different gases (water vapor, ethanol, acetone, ammonia, and isopropyl) on the dynamic response of resistance of the Au / graphene oxide / Au structure has been studied. The dynamic response shows that adsorption of all mentioned gases results in increase of the resistance. For ethanol, acetone and isopropyl adsorption and desorption cycles are almost identical. At the same time, in the case of water vapor and ammonia the cycle of desorption is very week, especially for the former, which attests different mechanisms of adsorption/desorption processes regarding to ethanol, acetone and isopropyl. The mechanisms of studied vapors adsorption/desorption are proposed.
Keywords: ultrasonic spray pyrolysis, graphene oxide, Raman spectroscopy, gas sensor.
O.M. Slobodian1*, Y.S. Milovanov2, V.A. Skryshevsky2, A.V. Vasin1, X. Tang3, J.-P. Raskin3, P.M. Lytvyn1,
K.V. Svezhentsova1, S.V. Malyuta1, A.N. Nazarov1
2Institute of High Technologies Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
3ICTEAM, Université catholique de Louvain (UCLouvain) Louvain-la-Neuve, Belgium
*Corresponding author e-mail: akapulko20@gmail.com
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