Chirality assignment of individual single-walled carbon nanotubes in carbon nanotube field-effect transistors by micro-photocurrent spectroscopy
Chirality assignment of individual single-walled carbon nanotubes in carbon nanotube field-effect transistors by micro-photocurrent spectroscopy
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DOI：
10.1063/1.1650554
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发表时间：
2004-02
影响因子：
4
通讯作者：
Y. Ohno;S. Kishimoto;T. Mizutani;T. Okazaki;H. Shinohara
中科院分区：
文献类型：
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作者：
Y. Ohno;S. Kishimoto;T. Mizutani;T. Okazaki;H. Shinohara
我们提出了一种可能性的手性分配的单壁碳纳米管场效应晶体管（FET）的微光电流光谱。采用乙醇化学气相沉积法，利用位置控制纳米管生长技术制备了纳米管场效应晶体管。利用显微光学测量系统获得了单根单壁碳纳米管的光电流信号。在光电流激发光谱中在1.73 eV处观察到峰。这对应于直径为1.2 nm的纳米管的货车霍韦奇点的光吸收。将实验结果与理论计算结果进行比较，确定了纳米管场效应管中纳米管的手性为（18，10）。
We have proposed a possibility of chirality assignment of individual single-walled carbon nanotubes in nanotube field-effect transistors (FETs) by micro-photocurrent spectroscopy. The nanotube FETs were fabricated by utilizing position-controlled nanotube growth technique using alcohol chemical vapor deposition. Photocurrent signal that originated from a single single-walled carbon nanotube was obtained by using microscopic optical measurement system. A peak was observed at 1.73 eV in the photocurrent excitation spectrum. This corresponds to optical absorption by van Hove singularity of the nanotube with a diameter of ∼2 nm. Chirality of the nanotube in the nanotube FET was assigned to be (18, 10) by comparing the experimental results with theoretical calculation.