Improved conductivity of transparent single-wall carbon nanotube thin films via stable postdeposition functionalization

Bhavin B. Parekh, Giovanni Fanchini, Goki Eda, Manish Chhowalla

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A simple postdeposition method for improving the conductivity of transparent and conducting single-wall carbon nanotube (SWNT) thin films via exposure to nitric acid and thionyl chloride is reported. A systematic study on a range of films of variable density and from different commercial sources of SWNTs is performed. The functionalized films possess sheet resistances as low as that of indium tin oxide (ITO) (∼30 ) albeit at lower transmittance (∼50%). At 80±5% transmittance, the functionalized films have resistance values ranging from 150 to 300 . The SWNT films, however, are more flexible than ITO. The stability of the functionalized films upon annealing and processing in solvents (water, methanol, and chloroform) is also reported.

Original languageEnglish
Article number121913
JournalApplied Physics Letters
Issue number12
Publication statusPublished - Mar 30 2007


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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