Enhanced surface modification engineering (H, F, Cl, Br, and NO2) of CdS nanowires with and without surface dangling bonds
Enhanced surface modification engineering (H, F, Cl, Br, and NO2) of CdS nanowires with and without surface dangling bonds
复制标题
具有和不具有表面悬挂键的 CdS 纳米线的增强表面改性工程(H、F、Cl、Br 和 NO2)
DOI:
10.1063/1.4928080
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发表时间:
2015-08
影响因子:
3.2
通讯作者:
Chen, Xiaoshuang
中科院分区:
文献类型:
--
作者:
Wang, Chunrui;Xu, Xiaofeng;Wang, Jiqing;Chen, Xiaoshuang
Semiconductor nanowires (NWs) can be applied in gas sensing and cell detection, but the sensing mechanism is not clearly understood. In this study, surface modification effect on the electronic properties of CdS NWs for different diameters with several species (H, F, Cl, Br, and NO2) is investigated by first principles calculations. The surface dangling bonds and halogen elements are chosen to represent the environment of the surface. Halogen passivation drastically changes the band gaps due to the strong electronegativity and the energy level of halogen atoms. Density of states analysis indicates that valence band maximum (VBM) of halogen-passivated NWs is formed by the p states of halogen atoms, while VBM of H-passivated NWs is originated from Cd 4d and S 3p orbitals. To illustrate that surface modification can be applied in gas sensing, NO2-absorbed NWs with different coverage are calculated. Low coverage of NO2 introduces a deep p-type dopant-like level, while high coverage introduces a shallow n-type...
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影响因子:
17.1
作者:
Haoyu Wu;Fei Meng;Linsen Li;Song Jin;Gengfeng Zheng
通讯作者:
Haoyu Wu;Fei Meng;Linsen Li;Song Jin;Gengfeng Zheng
影响因子:
4.6
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Guoxin Zhang;Peilei He;Xiuju Ma;Y. Kuang;Junfeng Liu;Xiaoming Sun
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Guoxin Zhang;Peilei He;Xiuju Ma;Y. Kuang;Junfeng Liu;Xiaoming Sun
影响因子:
3.7
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Furthmuller, J
影响因子:
10.8
作者:
Dayeh, Shadi A.;Tang, Wei;Picraux, S. Tom
通讯作者:
Picraux, S. Tom
影响因子:
3.3
作者:
Yan, Shancheng;Sun, Litao;Xiao, Zhongdang
通讯作者:
Xiao, Zhongdang