Optimum Thickness of Al2O3 Support Layer for Growth of Singlewalled Carbon Nanotubes
- Optimum Thickness of Al2O3 Support Layer for Growth of Singlewalled Carbon Nanotubes
- 김수연; 송우석; 김민국; 전철호; 정우성; 최원철; 박청윤
- Issue Date
- Japanese Journal of Applied Physics, Part 1- Regular Papers
- VOL 50, NO 7, 075103-1-075103-5
- 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.
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