Journal of Electronic Materials

, Volume 47, Issue 5, pp 2710–2717 | Cite as

Characterization and Electrical Response to Humidity of Sintered Polymeric Electrospun Fibers of Vanadium Oxide-(\({\hbox{TiO}}_{{2}} /{\hbox{WO}}_{{3}} \))

  • E. S. Araújo
  • J. Libardi
  • P. M. Faia
  • H. P. de Oliveira


Metal oxide composites have attracted much consideration due to their promising applications in humidity sensors in response to the physical and chemical property modifications of the resulting materials. This work focused on the preparation, microstructural characterization and analysis of humidity-dependent electrical properties of undoped and vanadium oxide (V2O5)-doped titanium oxide/tungsten oxide (TiO2/WO3) sintered ceramic films obtained by electrospinning. The electrical properties were investigated by impedance spectroscopy (400 Hz–40 MHz) as a function of relative humidity (RH). The results revealed a typical transition in the transport mechanisms controlled by the appropriated doping level of V2O5, which introduces important advantages to RH detection due to the atomic substitution of titanium by vanadium atoms in highly doped structures. These aspects are directly related to the microstructure modification and structure fabrication procedure.


Ceramic composites relative humidity electrospinning microstructural properties electrical characterization 


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This research was supported by FEDER funds, FCT funds - project UID/EMS/00285/2013, CNPq - projects (202451/2015-1) and (248958/2013-5).


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Copyright information

© The Minerals, Metals & Materials Society 2018

Authors and Affiliations

  1. 1.Institute of Materials ScienceFederal University of Sao Francisco ValleyJuazeiroBrazil
  2. 2.Physics DepartmentTechnological Institute of AeronauticsSão José dos CamposBrazil
  3. 3.Electrical and Computers Engineering DepartmentUniversity of CoimbraCoimbraPortugal

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