Journal of Solid State Electrochemistry

, Volume 11, Issue 5, pp 647–653 | Cite as

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

  • Ilana Abayev
  • Arie Zaban
  • Vladimir G. Kytin
  • Alexey A. Danilin
  • Germà Garcia-Belmonte
  • Juan Bisquert
Original Paper


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.


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Ilana Abayev
    • 1
  • Arie Zaban
    • 1
  • Vladimir G. Kytin
    • 2
  • Alexey A. Danilin
    • 2
  • Germà Garcia-Belmonte
    • 3
  • Juan Bisquert
    • 3
  1. 1.Department of ChemistryBar-Ilan UniversityRamat-GanIsrael
  2. 2.Department of PhysicsMoscow Lomonosov State UniversityMoscowRussia
  3. 3.Departament de Ciències ExperimentalsUniversitat Jaume ICastellonSpain

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