Investigating the effect of gas absorption on the electromechanical and electrochemical behavior of graphene/ZnO structure, suitable for highly selective and sensitive gas sensors

被引：26
作者：
Khadem, S. M. Jebreiil [1 ]
Abdi, Y. [1 ]
Darbari, S. [2 ]
Ostovari, F. [1 ,2 ]
机构：
[1] Univ Tehran, Dept Phys, Nanophys Res Lab, Tehran, Iran
[2] Univ Tarbiat Modares, ECE Dept, Tehran, Iran
来源：
CURRENT APPLIED PHYSICS | 2014年 / 14卷 / 11期
基金：
美国国家科学基金会;
关键词：
Graphene; ZnO; Gas sensor; Electromechanical; Electrochemical; LAYER GRAPHENE; GRAPHITE OXIDE; ZNO NANORODS; SINGLE-LAYER; CARBON; ETHANOL; REDUCTION; NANOWIRE; ARRAYS; PHASE;
D O I：
10.1016/j.cap.2014.07.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Graphene/ZnO hybrid was used, for the first time, to fabricate a highly selective and sensitive graphene based gas sensor by a combination of electromechanical and electrochemical characteristics of the graphene. ZnO nanowires in our fabricated sensor have two important roles: as the reductant of graphene oxide to obtain graphene and as an efficient electromechanical actuator due to their piezoelectric properties. To investigate the operation of the fabricated sensor as a gas sensor, a selected set of chemical vapors were introduced to the structure. It was found that chemical vapors change the resonance frequency of the graphene/ZnO structure, as well as the electrical resistivity of the sensor. The observed variation of the mechanical and electrical characteristics of the graphene/ZnO in response to gas exposure entitles the graphene/ZnO based sensor as a highly selective/sensitive device for gas sensing applications with distinctive signatures for different gas species. (C) 2014 Elsevier B.V. All rights reserved.
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收藏
页码：1498 / 1503
页数：6
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