Nanotube molecular wires as chemical sensors
Nanotube molecular wires as chemical sensors
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DOI：
10.1126/science.287.5453.622
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发表时间：
2000-01-28
期刊：
影响因子：
56.9
通讯作者：
Dai, HJ
中科院分区：
文献类型：
--
作者：
Kong, J;Franklin, NR;Dai, HJ
基于单个单壁碳纳米管（SWNTs）的化学传感器被证明。当暴露于气态分子如NO2或NH3时，发现半导体单壁碳纳米管的电阻显著增加或减少。这是纳米管分子传感器的基础。纳米管传感器表现出快速的响应和显着更高的灵敏度比现有的固态传感器在室温下。传感器可逆性是通过在环境条件下缓慢恢复或加热到高温来实现的。研究了分子物种与单壁碳纳米管之间的相互作用以及碳纳米管分子线的分子传感机理。
Chemical sensors based on individual single-walled carbon nanotubes (SWNTs) are demonstrated. Upon exposure to gaseous molecules such as NO2 or NH3, the electrical resistance of a semiconducting SWNT is found to dramatically increase or decrease. This serves as the basis for nanotube molecular sensors. The nanotube sensors exhibit a fast response and a substantially higher sensitivity than that of existing solid-state sensors at room temperature. Sensor reversibility is achieved by slow recovery under ambient conditions or by heating to high temperatures. The interactions between molecular species and SWNTs and the mechanisms of molecular sensing with nanotube molecular wires are investigated.