Humidity-sensing characteristics of multi-walled carbon nanotube sheet

被引：46
作者：
Jung, Daewoong [1 ]
Han, Maeum [1 ]
Lee, Gil S. [1 ]
机构：
[1] Univ Texas Dallas, Dept Elect Engn, Richardson, TX 75080 USA
来源：
MATERIALS LETTERS | 2014年 / 122卷
关键词：
Multi-walled; Carbon nanotube sheet; Humidity sensor; H2O ADSORPTION; SENSITIVITY; TRANSPORT; SENSOR;
D O I：
10.1016/j.matlet.2014.02.049
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The properties of humidity sensors made of spin-capable multi-walled carbon nanotubes (MWCNTs) were characterized and their sensing mechanisms analyzed. The results showed that their resistance increased linearly upon exposure to water molecules. Within the range of 10-90% relative humidity, the resistance of the MWCNT humidity sensor increased due to charge transfer. We found that the sensitivity and response time of the sensor could be improved by acid treatment. In addition, the surface area and contact number of MWCNTs played an important role in the improvement of sensor performance. (c) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：281 / 284
页数：4
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