Optimum Thickness of Al2O3 Support Layer for Growth of Singlewalled Carbon Nanotubes

Title
Optimum Thickness of Al2O3 Support Layer for Growth of Singlewalled Carbon Nanotubes
Authors
김수연송우석김민국전철호정우성최원철박청윤
Issue Date
2011-07
Publisher
Japanese Journal of Applied Physics, Part 1- Regular Papers
Citation
VOL 50, NO 7, 075103-1-075103-5
Abstract
An optimum thickness of Al2O3 support layer (ASL) for growth of singlewalled carbon nanotubes (SWCNTs) was systematically established. Atomic force microscopy and scanning electron microscopy results clearly revealed that increasing ASL thickness (tASL) resulted in increased ASL grain diameter and root mean square roughness. This significantly affected the diameters of CNTs through the restricted formation of Fe nanoparticles. As a result, SWCNTs and multiwalled CNTs were simultaneously synthesized using ASLs with tASL= 5, 50, and 100 nm, which were confirmed using Raman spectroscopy and transmission electron microscopy. In contrast, ASLs with tASL =10-30 nm, were suitable for predominant growth of SWCNTs, and ASL with tASL= 15nm was especially effective for growing high-quality SWCNTs with a small diameter and narrow distribution, 1:1± 0:15 nm.
URI
http://pubs.kist.re.kr/handle/201004/41972
ISSN
00214922
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KIST Publication > Article
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