title: Hybrid Gas Sensing and Transport Properties of Few-Walled CNTs Decorated with Discrete SnO₂ Nanoparticles.
abstract: CVD grown, few walled carbon nanotubes (FWCNTs) were quasi decorated with SnO₂nanoparticles (FWCNTs-SnO₂) and its gas sensing properties were analyzed with ammonia and ethanol. At room temperature FWCNTs-SnO₂show enhanced 'p type' gas sensing response than FWCNTs. Activation of SnO₂at high temperatures led to systematic changes in the sensing behavior towards 'n type' response. Temperature dependent transport behavior was found to be a one dimensional variable range hopping mechanism (1 D-VRH) for the FWCNTs and a 3D-VRH mechanism for the FWCNTs-SnO2. These temperature dependent gas transport and sensing properties elucidate the hybrid nature of the nanocomposite with novel characteristics. This also implies its importance as a potential gas sensor material.
authors.forename: Kamalakannan
authors.initials: K
authors.lastname: Ranganathan
authors.forename: Ilango
authors.initials: I
authors.lastname: Shanmugam
authors.forename: Mohammed
authors.initials: M
authors.lastname: Kamruddin
authors.forename: Ashok K
authors.initials: AK
authors.lastname: Tyagi