10.1186/2228-5326-2-34

Growth and characterization of optically confined particulate films of anatase TiO2

Show Details XML HTML PDF
  • Prakash Thanigainathan*1,
  • Chandrasekar Paramasivan2,
  1. Department of Medical Bionanotechnology, Chettinad Hospital and Research Institute, Kelambakkam, Chennai, Tamil Nadu, 603103, IN
  2. Department of Physics, Saveetha Engineering College Saveetha Nagar, Thandalam, Chennai, Tamil Nadu, 602105, IN
Cover Image

Published in Issue 2012-11-01

How to Cite

Thanigainathan, P., & Paramasivan, C. (2012). Growth and characterization of optically confined particulate films of anatase TiO2. International Nano Letters, 2(1 (December 2012). https://doi.org/10.1186/2228-5326-2-34
Crossref
Scopus
Google Scholar
Europe PMC

HTML views: 28

PDF views: 140

Abstract

Abstract TiO 2 particulate films with optically confined anatase phase were deposited on glass substrates using an aqueous precursor by dip-coating method. The precursor solution was prepared by mixing appropriate amounts of titanium tetraisopropoxide, isopropyl alcohol, and Triton X-100 in an airtight vessel. Without further treatment, the solution was used for the coating process. After deposition, the films were baked at 300°C, 450°C, and 600°C for 15 min in air atmosphere using a box furnace. Physical properties of such films were investigated by X-ray diffraction, scanning electron microscopy, and UV-visible spectrophotometry. Effective mass approximation theory was applied to explain the optical confinement effect which is realized in those films because of its crystallite size. The energy bandgap values for the confined anatase phase of TiO 2 particulates were predicted by the effective mass approximation model and are in good agreement with our experimental results. These observed results were discussed in detail.

Keywords

  • Transparent semiconductor,
  • Optical properties,
  • Effective mass approximation theory
HTML PDF

References

  1. Grätzel (2003) Dye-sensitized solar cells https://doi.org/10.1016/S1389-5567(03)00026-1
  2. Wu and Lai (1991) Effect of lead oxide on niobium-doped titania varistors https://doi.org/10.1111/j.1151-2916.1991.tb04308.x
  3. Huusko et al. (1993) TiO2 thick-film gas sensors and their suitability for NOx monitoring https://doi.org/10.1016/0925-4005(93)85188-G
  4. Sotomayor et al. (2000) Photoelectrochromic heterosupramolecular assemblies https://doi.org/10.1039/a908064c
  5. Huang et al. (1995) Rocking chair lithium battery based on nanocrystalline TiO2 (anatase) https://doi.org/10.1149/1.2048726
  6. Unknown ()
  7. Sato et al. (1989) Photochemical properties of ultrathin TiO2 films prepared by chemical vapor deposition https://doi.org/10.1016/1010-6030(89)85022-1
  8. Alaron et al. (1999) Structural characterization of TiO2 thin films obtained by pulsed laser deposition https://doi.org/10.1016/S0169-4332(98)00486-3
  9. Bhattacharyya et al. (2000) Spectroscopic ellipsometry of TiO2 layers prepared by ion-assisted electron-beam evaporation https://doi.org/10.1016/S0040-6090(99)00966-9
  10. Ritala et al. (1993) Titanium isopropoxide as a precursor in atomic layer epitaxy of titanium dioxide thin films https://doi.org/10.1021/cm00032a023
  11. Desgreniers and Lagarec (1994) XRDA: a program for energy-dispersive X-ray diffraction analysis on a PC https://doi.org/10.1107/S0021889893012610
  12. Djaoued et al. (2010) Photoinduced effect in TiO2 nanocrystaline films with different morphology https://doi.org/10.1016/j.jallcom.2010.08.135
  13. Kityk (2001) Non-linear optical phenomena in the large-sized nanocrystallites https://doi.org/10.1016/S0022-3093(01)00860-2
  14. Burs (1983) A simple model for the ionization potential, electron affinity, and aqueous redox potentials of small semiconductor crystallites https://doi.org/10.1063/1.445676
  15. Lee et al. (2005) Bandgap modulation of TiO2 and its effect on the activity in photocatalytic oxidation of 2-isopropyl-6-methyl-4-pyrimidinol https://doi.org/10.1007/s11244-005-3832-2