A Method for Preparation of Ordered Porous Silicon Based on a 2D SiO$_{2}$ Template
Ying Wu1 , Xiao-Xia Zhai2 , Cong-Mian Zhen1** , Xiao-Wei Liu1 , Li Ma1 , Deng-Lu Hou1
1 Hebei Advanced Thin Films Laboratory, Department of Physics, Hebei Normal University, Shijiazhuang 0500242 Shijiazhuang Institute of Technology, Shijiazhuang 050228
Abstract :A new method for fabricating ordered porous silicon is reported. A two-dimensional silica nanosphere array is used as a template with a hydrofluoric acid–hydrogen peroxide solution for etching the nanospheres. The initial diameter and distribution of the holes in the resulting porous silicon layer are determined by the size and distribution of the silica nanospheres. The corrosion time can be used to control the depths of the holes. It is found that the presence of a SiO$_{2}$ layer, formed by the oxidation of the rough internal surface of the hole, is the primary reason allowing the corrosion to proceed. Ultraviolet reflection and thermal conductivity measurements show that the diameter and distribution of the holes have a great influence on properties of the porous silicon.
收稿日期: 2016-01-06
出版日期: 2016-05-31
:
81.65.Cf
(Surface cleaning, etching, patterning)
78.67.Rb
(Nanoporous materials)
72.15.Jf
(Thermoelectric and thermomagnetic effects)
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