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Purification and Characterization of Single-Walled Carbon Nanotubes

Published online by Cambridge University Press:  10 February 2011

H.Y. Kim ,
W.B. Choi ,
N.S. Lee ,
D.S. Chung ,
J.H. Kang ,
I.T. Han ,
J.M. Kim ,
M.H. Moon  and
J.S. Kim
H.Y. Kim
Affiliation:
The National Creative Research Initiatives Center for Electron Emission Source, Samsung Advanced Institute of Technology, P.O.Box 111, Suwon, Koreahykim@sait.samsung.co.kr
W.B. Choi
Affiliation:
Display Lab.Samsung Advanced Institute of Technology
N.S. Lee
Affiliation:
Display Lab.Samsung Advanced Institute of Technology
D.S. Chung
Affiliation:
The National Creative Research Initiatives Center for Electron Emission Source, Samsung Advanced Institute of Technology, P.O.Box 111, Suwon, Koreahykim@sait.samsung.co.kr
J.H. Kang
Affiliation:
The National Creative Research Initiatives Center for Electron Emission Source, Samsung Advanced Institute of Technology, P.O.Box 111, Suwon, Koreahykim@sait.samsung.co.kr
I.T. Han
Affiliation:
Display Lab.Samsung Advanced Institute of Technology
J.M. Kim
Affiliation:
The National Creative Research Initiatives Center for Electron Emission Source, Samsung Advanced Institute of Technology, P.O.Box 111, Suwon, Koreahykim@sait.samsung.co.kr
M.H. Moon
Affiliation:
Pusan Nat'l Univ.Dept of Chemistry, Pusan, Korea
J.S. Kim
Affiliation:
Agency for Defence and Development, Taejon, Korea
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Abstract

Single-walled carbon nanotubes (SWNTs) were purified and cut into short length by the liquid phase oxidation using the typical oxidants such as HNO3, H2SO4 and their mixture. The SWNTacid solutions were refluxed at high temperature, filtered on poly tetra-fluoro ethylene (PTFE) filter paper. rinsed with distilled water, and then dried at room temperature. In order to find optimum purifying condition, acid solutions were made by mixing nitric / sulfuric acid by the different volume ratio. The reaction time was also varied from 1h to 6h. Through this method, purified SWNTs with the length of less than 2μm were successfully obtained, which was confirmed by scanning electron microscopy (SEM). From transmission electron microscopy (TEM) analysis, it was verified that SWNTs were purified with little damage on surface and metal catalysts were efficiently removed when sulfuric acid was mixed, which was also confirmed by energy disperse spectrum analysis (EDS). Moreover, size distribution of the purified SWNTs was characterized with Field Flow-Fractionation (FFF) method.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 593: Symposium U – Amorphous & Nanostructured Carbon , 1999 , 123
Copyright
Copyright © Materials Research Society 2000

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References

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