Effect of thiol on formaldehyde sensors based on CNTs

摘要：

Effect of thiol to the sensing characteristics of gas sensors based on cabon nanotubes(CNTs) were studied. Sensors were divided into three groups: pure CNTs coated on Au electrode; thiol-CNTs coated on Au electrode; pure CNTs coated on Au electrodes modified with alkanethiol self-assembled monolayers(SAMs). When exposed to formaldehyde of different concentration at room temperature, obvious differences in gas sensing responses were observed in three groups, which may caused by the following mechanisms. The alkyl chain of SAMs were indicated to improve the CNTs adhesion to Au electrode surface and build an enhancing electron transfer system; by contrast two ends of thiol-CNTs may strongly attach to the electrode surface forming a bow-type structure, which would decrease reactive functional groups and effective sensing area of the sensor.

关键词： thiol Carbon nanotubes sensing characteristics formaldehyde

作者: GUO Miao XU Ming-En PAN Min CHEN Yu-Quan

作者单位: Institute Of Biomedical Engineering and Instrument Hangzhou Dianzi University Hangzhou,China Department of Biomedical Engineering Zhejiang University Hangzhou,China

会议类型: 国际会议

会议名称: The 3rd International Conference on Bioinformatics and Biomedical Engineering(iCBBE 2009)(第三届生物信息与生物医学工程国际会议)

会议地点: 北京

会议语种:英文

页码: 1-3

在线出版日期: 2009-06-11（万方平台首次上网日期，不代表论文的发表时间）