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J Nanosci Nanotechnol. 2012 Mar;12(3):2742-9.

Effects of metal layer morphology to silicon nanostructure formation in metal-assisted etching.

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1
Department of Mechanical Engineering, National Central University, 32001 Jhongli, Taiwan.

Abstract

This study presents a rapid and simple approach for creating silicon nanostructures using metal-assisted etching. The thickness of the metal layer was found to be a key process parameter affecting the surface morphology of silicon nanostructures. Au and Ag layers with a thickness of 3 nm, 5 nm, and 10 nm were used to study the effects of metal catalyst thickness on silicon nanostructure morphology. The experimental results show that the surface morphology of metal has a significant influence on the silicon nanostructure morphology, such that the silicon nanostructures transform from porous silicon surfaces into filament nanostructures or silicon nanowire with increasing thicknesses of both the Au and Ag metal layers.

PMID:
22755117
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