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Structural modulation of silicon nanowires by combining a high gas flow rate with metal catalysts

Authors
 Dongjea Seo  ;  Jaejun Lee  ;  Sung Wook Kim  ;  Ilsoo Kim  ;  Jukwan Na  ;  Min-Ho Hong  ;  Heon-Jin Choi 
Citation
 NANOSCALE RESEARCH LETTERS, Vol.10 : 190, 2015 
Journal Title
 NANOSCALE RESEARCH LETTERS 
ISSN
 1931-7573 
Issue Date
2015
Keywords
Catalyst ; Growth ; SiNW ; Structural modulation ; Vapor-liquid-solid
Abstract
We grew silicon nanowires (SiNWs) by a vapor-liquid-solid (VLS) mechanism using metal catalysts of gold (Au), titanium (Ti), manganese (Mn), and iron (Fe) under a high flow rate of hydrogen (H2). This combination of catalyst types and high gas flow rate revealed the potential for growing various SiNWs, including kinked SiNWs (with Au), ultra-thin SiNWs having diameters about 5 nm (with Ti), rough-surfaced SiNWs (with Mn), and ribbon-shaped SiNWs tens of microns in width (with Fe). The high flow rate of gas affects the VLS mechanism differently for each combination; for example, it induces an unstable solid-liquid interfaces (with Au), active etching of the catalyst (with Ti), sidewall deposition by a vapor-solid (VS) mechanism, and an asymmetric precipitation of Si in the catalyst (with Fe). Our combinatorial approach may provide a new path for the structural modulation of SiNWs via the VLS mechanism. PACS: 80; 81; 82.
Files in This Item:
T201501863.pdf Download
DOI
10.1186/s11671-015-0893-4
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Dental Biomaterials and Bioengineering (치과생체재료공학교실) > 1. Journal Papers
Yonsei Authors
Hong, Min Ho(홍민호)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/156684
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