Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 53, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/JJAP.53.05HA07
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Funding
- National Research Foundation of Korea (NRF) - Korea government (MSIP) [2008-0061891]
- Industrial Strategic Technology Development Program [10045177]
- Technology Innovation Program - Ministry of Trade, Industry and Energy (MTIE, Korea) [10043195]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10043195] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2008-0061891] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Metal-assisted chemical etching (MACE) using a nanosphere lithography (NSL) technique is regarded as a general fabrication method for silicon nanowire (SINW) arrays. However, morphology control of SiNWs using this method has not been reported. In this study, silicon nanowire (SINW) and silicon nanocone (SINC) arrays were fabricated by MACE using a NSL. Depending on the concentration of etchants in the etching solution, the morphology of the wires and etching rate were systemically changed. At high concentrations, the wires were etched cylindrically and at low concentrations, tapered (cone-like) wires were obtained. To quantify the degree of tapering, the volume ratio of the etched part was calculated from their morphology. The degree of tapering increased as the concentrations of etchants decreased. We suggest that the mechanism of the formation of nanocone is related to the degree of hole diffusion under the metal layer, which was supported by field emission scanning electron microscope (FE-SEM) images. (C) 2014 The Japan Society of Applied Physics
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