TY - JOUR
T1 - Hydrogen gas sensor based on metal oxide nanoparticles decorated graphene transistor
AU - Zhang, Zhangyuan
AU - Zou, Xuming
AU - Xu, Lei
AU - Liao, Lei
AU - Liu, Wei
AU - Ho, Johnny
AU - Xiao, Xiangheng
AU - Jiang, Changzhong
AU - Li, Jinchai
N1 - Publisher Copyright:
© 2015 The Royal Society of Chemistry.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2015/6/14
Y1 - 2015/6/14
N2 - In this work, in order to enhance the performance of graphene gas sensors, graphene and metal oxide nanoparticles (NPs) are combined to be utilized for high selectivity and fast response gas detection. Whether at the relatively optimal temperature or even room temperature, our gas sensors based on graphene transistors, decorated with SnO2 NPs, exhibit fast response and short recovery times (∼1 seconds) at 50 °C when the hydrogen concentration is 100 ppm. Specifically, X-ray photoelectron spectroscopy and conductive atomic force microscopy are employed to explore the interface properties between graphene and SnO2 NPs. Through the complimentary characterization, a mechanism based on charge transfer and band alignment is elucidated to explain the physical originality of these graphene gas sensors: high carrier mobility of graphene and small energy barrier between graphene and SnO2 NPs have ensured a fast response and a high sensitivity and selectivity of the devices. Generally, these gas sensors will facilitate the rapid development of next-generation hydrogen gas detection.
AB - In this work, in order to enhance the performance of graphene gas sensors, graphene and metal oxide nanoparticles (NPs) are combined to be utilized for high selectivity and fast response gas detection. Whether at the relatively optimal temperature or even room temperature, our gas sensors based on graphene transistors, decorated with SnO2 NPs, exhibit fast response and short recovery times (∼1 seconds) at 50 °C when the hydrogen concentration is 100 ppm. Specifically, X-ray photoelectron spectroscopy and conductive atomic force microscopy are employed to explore the interface properties between graphene and SnO2 NPs. Through the complimentary characterization, a mechanism based on charge transfer and band alignment is elucidated to explain the physical originality of these graphene gas sensors: high carrier mobility of graphene and small energy barrier between graphene and SnO2 NPs have ensured a fast response and a high sensitivity and selectivity of the devices. Generally, these gas sensors will facilitate the rapid development of next-generation hydrogen gas detection.
UR - http://www.scopus.com/inward/record.url?scp=84930362074&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84930362074&partnerID=8YFLogxK
U2 - 10.1039/c5nr01924a
DO - 10.1039/c5nr01924a
M3 - Article
AN - SCOPUS:84930362074
VL - 7
SP - 10078
EP - 10084
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 22
ER -