一种基于单壁碳纳米管(SWC NT)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.
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