Modulation of the Work Function of Capped Single-Walled Carbon Nanotube by Alkali-Metal Adsorption: A Theoretical Study
Modulation of the Work Function of Capped Single-Walled Carbon Nanotube by Alkali-Metal Adsorption: A Theoretical Study
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碱金属吸附调节封端单壁碳纳米管功函数的理论研究
DOI:
10.1021/jp200885m
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发表时间:
2011-04
影响因子:
3.7
通讯作者:
Mimura, Hidenori
中科院分区:
文献类型:
--
作者:
Xu, Shun-Fu;Yuan, Guang;Li, Chun;Liu, Wei-Hui;Mimura, Hidenori
The influence of alkali-metal (Li/Na/Cs) adsorption on work functions of (5, 5) and (9, 0) single-walled carbon nanotubes (CNTs) with a capped edge was investigated by first-principles calculations. After alkali-metal adsorption, the work functions of (5, 5) and (9, 0) CNTs decrease and vary linearly with the electronegativity of the element, but the positions where the alkali atom is adsorbed considerably influence the work functions. However, any vacancy defect on the cap raises the work functions of the CNTs. The variations in the work functions are mainly attributed to changes in the Fermi levels induced by charge redistributions. Additionally, alkali-metal adsorption can improve the electric conductivity of a CNT mixture.
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影响因子:
8.6
作者:
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通讯作者:
von Allmen, P
影响因子:
4
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3.3
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影响因子:
8.6
作者:
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通讯作者:
Avouris, P