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Processing of single wall carbon nanotubes and implications for filling experiments

Published online by Cambridge University Press:  15 March 2011

Satishkumar B. Chikkannanavar ,
Brian W. Smith ,
Richard M. Russo ,
Ferenc Stercel  and
David E. Luzzi
Satishkumar B. Chikkannanavar
Affiliation:
Laboratory for Research on Structure of Matter Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104-6272, USA
Brian W. Smith
Affiliation:
Laboratory for Research on Structure of Matter Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104-6272, USA
Richard M. Russo
Affiliation:
Laboratory for Research on Structure of Matter Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104-6272, USA
Ferenc Stercel
Affiliation:
Laboratory for Research on Structure of Matter Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104-6272, USA
David E. Luzzi
Affiliation:
Laboratory for Research on Structure of Matter Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104-6272, USA
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Abstract

Single wall carbon nanotubes (SWNTs) have been processed in different schemes to get clean material for use in various filling experiments. The SWNTs synthesized by different methods require different processing schemes, and this is presumably due to heterogeneous nature of the various contaminants present along with the carbon nanotubes. For the pulsed laser synthesized SWNTs, a combination of nitric acid, hydrogen peroxide and hydrochloric acid treatment gives best results and the purified SWNTs give best ever filling fraction for fullerene, C60 of ~90%. The processing improves the surface cleanliness of SWNTs, in turn giving greater access for the target molecules, and hence the higher filling fraction. For the carbon arc produced SWNTs, air oxidation followed by treatment with nitric acid has been found to work best and the processed SWNTs have been used for filling experiments with metal chlorides. Both these processing schemes still leave a small fraction of catalyst impurities in the final material, thus the material quality of filled material and hence its properties depend on the processed material used for the filling experiments.

Type
Article
Information
MRS Online Proceedings Library (OPL) , Volume 706: Symposium Z – Making Functional Materials with Nanotubes , 2001 , Z2.7.1
Copyright
Copyright © Materials Research Society 2002

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