Carrier Dynamics and Optical Kerr Effect of Titanium Dioxide Single Crystals by Femtosecond Transient Grating Spectroscopy

• Autorzy: Yang X. , Wang L. , Nakato Y. , Tamai N.
• Języki publikacji: EN

Abstrakty

EN

The photogenerated carrier dynamics and optical Kerr effect in rutile titanium dioxide (TiO2) single crystals with (100), (110), and (001) faces were examined by femtosecond transient grating spectroscopy. The diffraction signal of the intensity grating in bare TiO2 single crystal at 670 nm was considered to be due to free electrons or weakly trapped electrons nearby Ti4+ sites within the bulk. The decay curves of transient grating were strongly dependent on the excitation in tensity but not on the types of crystal faces. The subsequent inten sity-dependent relaxation was interpreted in terms of second-order electron-hole recombination kinetics with the rate constant of ~ 2×10-11 cm3s-1 for both (110) and (100) faces. The optical Kerr dynamics of bare TiO2 examined by resonant polarization grating and non-resonant intensity grating shows an ultrafast response similar to the system response function, indicating that the Kerr signal is mainly due to electronic polarization. By the excitation of conduction band electrons of reduced TiO2 with the excess energy of 1.7 eV, the relaxation time constant of hot electrons within the conduction band was estimated to be 310 fs. In the long time region, the propagation of acoustic wave of 1.28 GHz was observed, which was due to the excess energy of hot electron converted into the thermal energy by electron-phonon scattering followed by the thermal relaxation.

Słowa kluczowe

EN

titanium dioxide single crystal; transient grating; electron-hole recombination; optical Kerr effect; acoustic wave

• Wydawca: Polskie Towarzystwo Chemiczne
• Czasopismo: Polish Journal of Chemistry
• Rocznik: 2008
• Tom: Vol. 82, nr 4
• Strony: 715--727
• Opis fizyczny: Bibliogr. 44 poz., rys.

Twórcy

autor

Yang X.

autor

Wang L.

autor

Nakato Y.

autor

Tamai N.

• Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda 669-1337, Japan Fax: [phone],

Bibliografia

• 1. Russell F.H. and Gratzel M., J. Phys. Chem., 89, 4495 (1985).
• 2. Gratzel M. and Howe R.F, J. Phys. Chem., 94, 2566 (1990).
• 3. Shiga A., Tsujiko A. and Nakato Y., J. Phys. Chem., 102, 6049 (1998).
• 4. Li W., Osora H., Otero L. and Fox M.A., J. Phys. Chem., 102, 5333 (1998).
• 5. Serpone N., Lawless D. and Khairutdinov R., J. Phys. Chem., 99, 16646 (1995).
• 6. Colombo D.P. Jr., Roussel K.A., Saeh R. and Bowman R.M., Chem. Phys. Lett., 232, 207 (1995);Skinner D.E., Colombo D.P. Jr., Cavaleri J.J. and Bowman R.M., J. Phys. Chem., 99, 7853 (l995);Colombo D.P. and Bowman R.M., J. Phys. Chem., 100, 18445 (1996).
• 7. Hannappel T., Burfeindt B. and Storck W., J. Phys. Chem. B, 101, 6799 (1997).
• 8. Hilgendorff M. and Sundstrom V., Chem. Phys. Lett., 287, 709 (1998).
• 9. Yang X. and Tamai N., Phys. Chem. Chem. Phys., 3, 3393 (2001).
• 10. Serpone N., Lawless D. and Khairutdinov R., J. Phys. Chem., 99, 16655 (1995).
• ll. Yoshihara T., Katoh R., Furube A., Tamaki Y, Murai M., Hara K., Murata S., Arakawa H. and Tachiya M., J. Phys. Chem. B, 108, 3817 (2004); Tamaki Y, Furube A., Murai M., Hara K., Katoh R. and Tachiya M., J. Am. Chem. Soc., 128, 416 (2006).
• 12. Cavaleri J.J., Colombo D.P. Jr. and Bowman R.M., J. Phys. Chem. B, 102, 1341 (1998).
• 13. Cavaleri J.J., Skinner D.E., Colombo D.P. Jr. and Bowman R.M., J. Chem. Phys., 103, 5378 (1995).
• 14. Logunov S., Green T., Marguet S. and El-Sayed M.A., J. Phys. Chem. A, 102, 5652 (1998).
• 15. Kaschke M., Ernsting N.P, Muller U. and Weller H., Chem. Phys. Lett., 168, 543 (1990).
• 16. ErnstingN.P, Kaschke M., Weller H. and Katsikas L., 7. Opt. Soc. Am. B, 7, 1623(1990).
• 17. Serpone N. and Pelizzetti E., Photocatalysis-Fundamentals and Applications, Wiley Interscience,New York, 1989.
• 18. Fox M.A. and Dulay M.T., Chem. Rev., 93, 341 (1993).
• 19. Kamat P.V., Chem. Rev., 93, 267 (1993).
• 20. Fujishima A., Rao T.N. and Tryk D.A., J. Photochem. Photobiol. C, l, l (2000).
• 21. Tachikawa T., Fujitsuka M. and Majima T, J. Phys. Chem. C, 111, 5259 (2007).
• 22. Helz G.R. and Crosby D.G.,Aquatic and Surface Photochemistry, Lewis/CRC Press, Boca Raton, 1994.
• 23. Ollis D.F. and Al-Ekabi H., Photocatalytic Purification and Treatment of Water and Air, Elsevier,Amsterdam, 1993.
• 24. Gratzel M. and Kalyanasundaram K., Kinetic and Catalysis in Microheterogeneous System, Marcel Dekker, New York, 1991.
• 25. Rothenberger G., Moser J., Gratzel M. and Sharma D.K., J. Am. Chem. Soc., 107, 8054(1985).
• 26. Tamai N. and Masuhara H., Chem. Phys. Lett., 191, 189 (1992).
• 27. Eichler H.J., Gunter P. and Pohl D.W., Laser-Induced Dynamic Gratings, Springer-Verlag, Berlin, 1986.
• 28. Nelson K.A., Sasalegno R., Miller R.J.D. and Fayer M.D. ,,J., Chem. Phys., 77, 1144 (1982).
• 29. Tamai N., Asahi T. and Masuhara H., Chem. Phys. Lett., 234, 413 (1992).
• 30. Asahi T, Tamai N., Uchida T, Shimo W. and Masuhara H., Chem. Phys. Lett., 234, 337 (1995).
• 31. Deeg F. W. and Fayer M.D., J. Chem. Phys., 91, 2269 (1989).
• 32. Furabe A., Asahi T, Masuhara H., Yamashita H. and Anpo M., Chem. Lett., 753 (1997).
• 33. Wang L., Zhao H., Weng Y, Nakato Y. and Tamai N., submitted.
• 34. Howe R.F. and Gratzel M., J. Phys. Chem., 91, 3906 (1987).
• 35. Ohtani B., Kominami H., Bowman R.M., Colombo D.P. Jr., Noguchi H. and Uosaki K., Chem. Lett., 579(1998).
• 36. Johnson O.W., Ohlsen W.D. and Kingsbury P.I. Jr., Phys. Rev., 175, 1102 (1968)
• 37. Subbarao S.N., Yun Y.H., Kershaw R., Dwight K. and Wold A., Mat. Res. Bull., 13, 1461 (1978).
• 38. Frederikse H.P.R., J. Appl Phys.,32,2211 (1961).
• 39. Huybrechts W. and Devreese J., Solid State Commun., 17, 401 (1975).
• 40. He T, Phys. Rev. B, 51, 16689 (1995).
• 41. Nishimura H., Harata A. and Sawada T, Jpn. J. Appl. Phys., 32, 5149 (1993).
• 42. Harata A., Adachi N. and Sawada T, Phys. Rev. B, 58, 7319(1998).
• 43. Turkovic A., Tonejc A., Popovic S., Dubcek R, Ivanda M , Music S. and Gotic M., Fizika A, 6, 77 (1997).
• 44. Pomerantz M., Grossman S. and Koo J., Phys. Rev. B, 8, 5828 (1973).