Kong J, Franklin NR, Zhou C, Chapline MG, Peng S, Cho K, Dai H
Department of Chemistry, Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, USA.
Science. 2000 Jan 28;287(5453):622-5. doi: 10.1126/science.287.5453.622.
Chemical sensors based on individual single-walled carbon nanotubes (SWNTs) are demonstrated. Upon exposure to gaseous molecules such as NO(2) or NH(3), 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.
展示了基于单个单壁碳纳米管（SWNT）的化学传感器。当暴露于诸如NO₂或NH₃等气态分子时，发现半导体单壁碳纳米管的电阻会急剧增加或降低。这构成了纳米管分子传感器的基础。纳米管传感器在室温下表现出快速响应，并且比现有的固态传感器具有更高的灵敏度。通过在环境条件下缓慢恢复或加热到高温来实现传感器的可逆性。研究了分子物种与单壁碳纳米管之间的相互作用以及纳米管分子线的分子传感机制。
