Electrical transport properties of single crystal vanadium pentoxide nanowires

Muhammad Hussain, M. Nadeem, Hongyu Sun, Shafqat Karim, Amjad Nisar, Maaz Khan, Mashkoor Ahmad

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The electrical transport properties of hydrothermally synthesized V2O5 nanowires were investigated by impedance spectroscopy at room temperature in the frequency range of 1 Hz-1 MHz. The structural and morphological analyses confirm the single crystalline orthorhombic nature of the nanowires. The complex impedance plane plot showed two overlapping semicircles with dominating low frequency arc. The resistance from the oxygen vacancies and oxygen stoichiometric V2O5 NWs regions contribute to the g overall transport behavior of NWs. The normalized functions (Z(//) /Z(max)(//) and M-// /M-max(//)) suggests that the long range movements of the charge carriers are dominant at 100 Hz. The tangent loss (tan delta) was observed in accordance with the impedance plane plot. The sigma(ac) conductivity (Jac showed substantial increase from 1 x 10(-6)-3 x 10(-5) (S/cm(2)) in the frequency range of 5 x 10(3)-10(5) Hz attributing to a large number of charge carriers available for conduction by hopping. (C) 2015 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalMaterials Chemistry and Physics
Volume159
Pages (from-to)19-24
Number of pages6
ISSN0254-0584
DOIs
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • Energy dispersive analysis of X-rays (EDS or EDAX)
  • Electron microscopy (STEM, TEM and SEM)
  • Electrical characterisation
  • Oxides
  • Microstructure
  • Anealing

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