Journal of Solid State Electrochemistry

, Volume 11, Issue 5, pp 647–653

Properties of the electronic density of states in TiO2 nanoparticles surrounded with aqueous electrolyte

Authors

  • Ilana Abayev
    • Department of ChemistryBar-Ilan University
  • Arie Zaban
    • Department of ChemistryBar-Ilan University
  • Vladimir G. Kytin
    • Department of PhysicsMoscow Lomonosov State University
  • Alexey A. Danilin
    • Department of PhysicsMoscow Lomonosov State University
  • Germà Garcia-Belmonte
    • Departament de Ciències ExperimentalsUniversitat Jaume I
    • Departament de Ciències ExperimentalsUniversitat Jaume I
Original Paper

DOI: 10.1007/s10008-006-0220-1

Cite this article as:
Abayev, I., Zaban, A., Kytin, V.G. et al. J Solid State Electrochem (2007) 11: 647. doi:10.1007/s10008-006-0220-1

Abstract

Results on the density of sates of nanostructured TiO2 as a function of particle size and temperature are reported. In TiO2 nanoparticles with a mean diameter 10 nm, the density of states (DOS) is strongly temperature-dependent, indicating a rearrangement of the bandgap states in which the exponential energy parameter (width of the distribution) increases from 0.080 to 50 °C. For nanoparticles with mean diameters of 20 and 30 nm the DOS is much closer to an exponential distribution, and is much less sensitive to temperature variations. It is suggested that nanometer confinement has a significant influence on the density of electronic states for 10-nm particles, while band tailing is similar to that occurring in bulk semiconductors for the larger particles.

Copyright information

© Springer-Verlag 2006