Abstract

Thin films of single-walled carbon nanotubes (SWCNTs) were prepared by vacuum filtration. The electrical behavior of the as-prepared, annealed and HNO 3-treated SWCNT thin films was investigated. The results demonstrated that the post-treatments play an important role in modifying the electrical properties of the SWCNT thin films. The changes in the electrical properties upon annealing and HNO 3-treatment were attributed to the chemical–charge-transfer. A room-temperature ethanol alcohol sensor based on the SWCNT film has been demonstrated.

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