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Simultaneous Conductivity and Solubility of Double-Walled Carbon Nanotubes

A.H. Brozena, J. Moskowitz, B. Shao, S. Deng, H. Liao, K.J. Gaskell, Y.H. Wang
University of Maryland, College Park, US

Keywords: carbon nanotubes, double-walled carbon nanotubes, electrical percolation, covalent functionalization, water solubility

Abstract:

Using controlled oxidation, double-walled carbon nanotubes are selectively functionalized on the outerwall to significantly increase water solubility. Simultaneously, the graphitic network of the inner-tube is left intact, which allows electrical conductivity of the nanotube to be retained. Electrical percolation pathways are made possible by contact between the inner-tube and non-oxidized regions of the outerwall. This allows thin films of outerwall selectively oxidized double-walled carbon nanotubes to retain electrical conductivity 65% better than similarly oxidized single-walled carbon nanotube films.
 
 
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