期刊
NANOSCALE
卷 8, 期 5, 页码 3085-3092出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr07327h
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资金
- National High-tech R&D Program of China (863 Program) [2015AA034601]
- National Natural Science Foundation of China [91333122, 51402106, 51372082, 51172069, 51202067, 61204064]
- Ph. D. Programs Foundation of Ministry of Education of China [20120036120006, 20130036110012]
- Par-Eu Scholars Program, Fundamental Research Funds for the Central Universities
- China Scholarship Council
- NSSEFF fellowship (ONR) [N00014-15-1-0030]
The etching anisotropy induced by the morphology and rotation of silver particles controls the morphology of silicon nanoporous structures, through various underlying complex etching mechanisms. The level of etching anisotropy can be modulated by controlling the morphology of the silver catalyst to obtain silicon nanoporous structures with straight pores, cone-shaped pores and pyramid-shaped pores. In addition, the structures with helical pores are obtained by taking advantage of the special anisotropic etching, which is induced by the rotation and revolution of silver particles during the etching process. An investigation of the etching anisotropy during metal assisted chemical etching will promote a deep understanding of the chemical etching mechanism of silicon, and provide a feasible approach to fabricate Si nanoporous structures with special morphologies.
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