title: Synthesis and electrical transport of single-crystal NH4V3O8 nanobelts.
abstract: Monoclinic NH(4)V(3)O(8) single-crystalline nanobelts with widths of 80-180 nm, thicknesses of 50-100 nm, and lengths up to tens of micrometers have been synthesized at large scale in an ammonium metavanadate solution by a templates/catalysts-free route. Such nanobelts grow along the direction of [010]. The individual NH(4)V(3)O(8) nanobelt exhibits nonlinear, symmetric current/voltage (I/V) characteristics, with a conductivity of 0.1-1 S/cm at room temperature and a dielectric constant of approximately 130. The dominant conduction mechanism is based on small polaron hopping due to ohmic mechanism at low electric field below 249 V/cm due to Schottky emission at medium electric field between 249 and 600 V/cm and due to the Poole-Frenkel emission mechanism at high field above 600 V/cm.
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245, USA.
authors.forename: L Q
authors.initials: LQ
authors.lastname: Mai
authors.forename: C S
authors.initials: CS
authors.lastname: Lao
authors.forename: B
authors.initials: B
authors.lastname: Hu
authors.forename: J
authors.initials: J
authors.lastname: Zhou
authors.forename: Y Y
authors.initials: YY
authors.lastname: Qi
authors.forename: W
authors.initials: W
authors.lastname: Chen
authors.forename: E D
authors.initials: ED
authors.lastname: Gu
authors.forename: Z L
authors.initials: ZL
authors.lastname: Wang
mesh_terms: D002384:Catalysis; D003460:Crystallization; D004563:Electrochemistry / Q000379:methods; D008855:Microscopy, Electron, Scanning; D015233:Models, Statistical; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D010100:Oxygen / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013696:Temperature; D014639:Vanadium / Q000737:chemistry*; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D000644:Quaternary Ammonium Compounds; D014639:Vanadium; D014867:Water; D010100:Oxygen