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Purification of SWNTs Using Microwave Heating

Published online by Cambridge University Press:  15 March 2011

Avetik R. Harutyunyan ,
Bhabendra K. Pradhan ,
Gamini U. Sumanasekera ,
Jiping Chang ,
Gugang Chen ,
H. Goto ,
J. Fujiwara  and
Peter C. Eklund
Avetik R. Harutyunyan
Affiliation:
Dept. of Physics, 104 Davey Laboratory
Bhabendra K. Pradhan
Affiliation:
Dept. of Physics, 104 Davey Laboratory
Gamini U. Sumanasekera
Affiliation:
Dept. of Physics, 104 Davey Laboratory
Jiping Chang
Affiliation:
Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
Gugang Chen
Affiliation:
Dept. of Physics, 104 Davey Laboratory
H. Goto
Affiliation:
Honda R&D Co., Ltd. Wako Research Center, Saitama 351-0193, Japan
J. Fujiwara
Affiliation:
Honda R&D Co., Ltd. Wako Research Center, Saitama 351-0193, Japan
Peter C. Eklund
Affiliation:
Dept. of Physics, 104 Davey Laboratory
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Abstract

A new method for purifying single wall carbon nanotubes (SWNTs) using microwave heating is developed. The microwaves couple to the residual metal catalyst, raising significantly the local temperature leading to both the oxidation and rupturing of the carbon passivation layer over the metal catalyst particles and sintering. With this protective carbon coating weakened or removed, a mild acid treatment in HCl is then sufficient to remove most of the metal in the sample, leaving the nanotubes in tact. Results from transmission and scanning electron microscopy (TEM & SEM), Raman spectroscopy and thermo-gravimetric studies are discussed.

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Type
Article
Information
MRS Online Proceedings Library (OPL) , Volume 706: Symposium Z – Making Functional Materials with Nanotubes , 2001 , Z2.8.1
Copyright
Copyright © Materials Research Society 2002

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