单壁碳纳米管环境传感器的简易组装与性能研究
Facile fabrication of nanosensors based on random single wall carbon nanotubes for detection of Hg2+ ions

周琪 ¹ 钟永辉 ¹ 王岩 ¹ 陈星 ² 吴玉程 ¹

文摘	一种基于单壁碳纳米管(SWCNT)随机网络的环境传感器被成功的组装,并应用于溶液中痕量Hg2+的检测。首先将SWCNT经浓硝酸和浓硫酸混合液处理,而后在硅基金间隙电极表面修饰一层3-氨基丙基三甲氧基硅烷(APTMS),通过羧基与氨基间的静电吸附作用,最终将SWCNT均匀分散到经过修饰的间隙电极上。通过SEM,TEM,FTIR对其形貌、结构进行了表征,用Keithley4200型半导体测量仪测试了该传感器在不同浓度Hg2+溶液中的电学特性。实验结果表明,基于碳纳米管的环境传感器对Hg2+具有良好的电化学响应,检测浓度下限达到2nM/L。
其他语种文摘	Environmental nanosensor based on random networks of single - walled carbon nanotubes has been fabricated by a simple self - assembly method,which was further employed to detect the trace Hg2 + in water. SWCNT were oxidized by mixing nitric acid and sulfuric acid,and the interdigital gold microelectrode was self - assembled with a monolayer of aminopropyltriethoxy silane (APTMS). Because of electrostatic adsorption between APTMS and oxidised SWCNT,SWCNT could securely assembled to the surface of interdigital gold microelectrode. Environmental nanosensor can be characterized by SEM,TEM, FTIR,and the variation of the electrical conductance of the environmental nanosensors corresponding to the presence of Hg2 + with different concentration was measured by Keithley 4200. In this study,environmental nanosensor has impressive sensitivity to Hg2 +,which exhibited a detection limit of 2 nM for Hg2 + in water.
来源	功能材料与器件学报 ,2012,18(5):350-354 【扩展库】
关键词	单壁碳纳米管 ; 环境传感器 ; 简易组装 ; Hg2+
地址	1. 合肥工业大学材料科学与工程学院, 安徽, 合肥, 230009 2. 中科院合肥智能机械研究所, 安徽, 合肥, 230031
语种	中文
ISSN	1007-4252
学科	自动化技术、计算机技术
基金	国家自然科学基金 ; 安徽省国际科技合作计划项目
文献收藏号	CSCD:4728057