Coaxial ZnSe/Si nanocables with controlled p-type shell doping

Coaxial ZnSe/Si nanocables were successfully produced by a simple two-step growth method. ZnSe nanowire cores were first synthesized by thermal evaporation and then followed by the chemical vapor deposition (CVD) growth of Si shells. The former have a cubic single-crystal structure with a longitudin...

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Bibliographic Details
Published in:Nanotechnology 2010-07, Vol.21 (28), p.285206-285206
Main Authors: Wang, Li, Jie, Jiansheng, Wu, Chunyan, Wang, Zhi, Yu, Yongqiang, Peng, Qiang, Zhang, Xiwei, Hu, Zhizhong, Wu, Di, Guo, Huier, Jiang, Yang
Format: Article
Language:English
Subjects:
Chemical vapor deposition
Doping
Electrical measurement
Nanocomposites
Nanomaterials
Nanostructure
Shells
Silicon
Zinc selenides
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Summary:Coaxial ZnSe/Si nanocables were successfully produced by a simple two-step growth method. ZnSe nanowire cores were first synthesized by thermal evaporation and then followed by the chemical vapor deposition (CVD) growth of Si shells. The former have a cubic single-crystal structure with a longitudinal direction of [Formula: see text], while the latter are polycrystalline and composed of a large number of Si crystal grains with dominantly (111) surfaces. Controlled p-type doping to the Si shells was implemented by B diffusion after the shell growth. Electrical measurements on the Si shells demonstrated that the shell conductivity could be tuned in a wide range of eight orders of magnitude by adjusting the B concentration, and a hole mobility of 11.7 cm(2) V( - 1) s( - 1) and a hole concentration of 2 x 10(15) cm( - 3) were revealed for the modestly doped Si shells. The ZnSe/Si core/shell nanocables have great potential in nano-optoelectronic applications.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/21/28/285206