High efficiency room temperature detection of NO2 gas based on ultrathin metal/graphene devices
High efficiency room temperature detection of NO2 gas based on ultrathin metal/graphene devices
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基于超薄金属/石墨烯器件的NO2气体室温高效检测
DOI：
10.1039/c6ra16863a
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发表时间：
2016-09
期刊：
影响因子：
3.9
通讯作者：
Chu Weiguo
中科院分区：
文献类型：
--
作者：
Zhao Min;Dong Fengliang;Yan Lanqin;Xu Lihua;Zhang Xianfeng;Chen Peipei;Song Zhiwei;Chu Weiguo
制备了超薄金属（Au、Ag、Ti、Al、Pt和Pd）修饰的化学气相沉积（CVD）石墨烯NO2传感器，并在室温（RT）下测试了其传感性能。发现所有装置与裸露的原始石墨烯装置相比表现出好得多的响应性能。厚度为1 nm的Ti和Al被证实被完全氧化，而其它金属如Au、Pt和Pd主要以金属的形式存在。Pt修饰的石墨烯传感器具有最佳的灵敏度，例如在室温下暴露于0.2 ppm NO2 3分钟后为-5.8%，恢复时间约为2分钟。Ti修饰的石墨烯器件具有良好的灵敏度、响应和恢复性能以及较大的动态浓度范围，被认为是NO2检测的潜在传感器。Pt和Ti修饰的石墨烯器件都显示出相对良好的选择性和稳定性。金属的不同电子结构以及金属与石墨烯的不同协同效应是这些器件对NO2气体响应的显著差异的原因。本研究为理论计算提供了坚实的实验数据，促进了对NO2响应的确切机制的深入探索。
Ultrathin metal (Au, Ag, Ti, Al, Pt and Pd) decorated chemical-vapor-deposition (CVD)-grown graphene sensors for NO2 detection were fabricated and their sensing performances were tested at room temperature (RT). All devices were found to exhibit far better response performances compared to the bare pristine graphene device. Ti and Al with a thickness of 1 nm were confirmed to be fully oxidized whereas other metals such as Au, Pt and Pd predominantly existed in the form of metals. The Pt decorated graphene sensors had the best sensitivity such as −5.8% upon 3 minutes of exposure to 0.2 ppm NO2 at RT with a recovery time of about 2 minutes. The Ti decorated graphene devices are believed to be potential sensors for NO2 detection due to their good sensitivity, response and recovery performance, and large dynamic concentration range. Both Pt and Ti decorated graphene devices showed relatively good selectivity and stability. The different electronic structures of the metals and the different synergic effects of the metals with graphene are responsible for the dramatic difference of the responses of these devices to NO2 gas. The current study provides solid experimental data for theoretical calculations, promoting the intensive exploration of the exact mechanism of response to NO2.
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影响因子：
3.9
作者：
Haifen Xie;Keke Wang;Zhiqiang Zhang;Xiaojing Zhao;F. Liu;H. Mu
通讯作者：
Haifen Xie;Keke Wang;Zhiqiang Zhang;Xiaojing Zhao;F. Liu;H. Mu
DOI：
10.1039/c3cp43454k
发表时间：
2013-03
期刊：
Physical chemistry chemical physics : PCCP
影响因子：
--
作者：
Danling Wang;Antao Chen;A. Jen
通讯作者：
Danling Wang;Antao Chen;A. Jen
影响因子：
8.4
作者：
M. Mohammadi;D. Fray
通讯作者：
M. Mohammadi;D. Fray
影响因子：
1.9
作者：
Nasehnia, F.;Seifi, M.
通讯作者：
Seifi, M.
DOI：
10.1007/s11426-014-5066-2
发表时间：
2014
期刊：
Science China Chemistry
影响因子：
--
作者：
Congcong Ma;Xiaohong Shao;D. Cao
通讯作者：
Congcong Ma;Xiaohong Shao;D. Cao