A convenient way of manufacturing silicon nanotubes on a silicon substrate

作者：Zhang, Changchang; Cheng, Heming; Liu, Xiang^*

来源：Materials Chemistry and Physics, 2016, 177: 479-484.

DOI：10.1016/j.matchemphys.2016.04.058

• Etching
• Semiconductors
• Nanostructures
• Surfaces

A convenient approach of preparing silicon nanotubes (SiNTs) on a silicon substrate is described in this work in detail. Firstly, a porous silicon (PSi) slice is prepared by a galvanic displacement reaction. Then it is put into aqueous solutions of 20% (w%) ammonium fluoride and 2.5 mM cobalt nitrate for a predetermined time. The cobalt ions are reduced and the resulted cobalt particles are deposited on the PSi slice. After the cobalt particles are removed with 5 M nitric acid a plenty of SiNTs come out and exhibit disorderly on the silicon substrate, which are illustrated by scanning electron microscopy (SEM). The compositions of the SiNTs are examined by energy-dispersive X-ray spectroscopy. Based on the SEM images, a suggested mechanism is put forward to explain the generation of the SiNTs on the PSi substrate.

• 出版日期2016-7-1
• 单位安徽工业大学