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Influence of heat treatment and γ-irradiation on the optical properties of methylene blue trihydrate thin films

Published online by Cambridge University Press:  05 February 2008

A. F. El-Deeb ,
M. M. El-Nahass ,
M. A. Kamel  and
S. Y. Huthaily
A. F. El-Deeb*
Affiliation:
Physics department, Faculty of Education, Ain Shams University, Roxy 11757 Cairo, Egypt
M. M. El-Nahass
Affiliation:
Physics department, Faculty of Education, Ain Shams University, Roxy 11757 Cairo, Egypt
M. A. Kamel
Affiliation:
Physics department, Faculty of Education, Ain Shams University, Roxy 11757 Cairo, Egypt
S. Y. Huthaily
Affiliation:
Physics department, Faculty of Education, Ain Shams University, Roxy 11757 Cairo, Egypt
*
dr.a.eldeeb@gmail.com
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Abstract

Structural and optical properties of thermally evaporated methylene blue trihydrate thin films up to a film thickness of 165 nm have been investigated. The lattice constants and the crystallite size were calculated. The optical parameters were obtained using spectrophotometric measurements of the transmittance and reflectance at normal incidence of light in the wavelengths range 200–2500 nm. Below the absorption edge, subgap absorption in the energy range 0.75–1.4 eV was observed and interpreted in terms of defect states induced absorption phenomena and act as deep traps for charge carriers. The type of optical transition was found to be an indirect allowed transition. The values of the optical gap Eopt, the transport gap Et, the exciton binding energy EB, the Urbach's energy Eu and the dispersion parameters for as-deposited, annealed and irradiated films with different doses of γ-irradiation were estimated and discussed their influenced by heat treatment and irradiation.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 41 , Issue 1 , January 2008 , pp. 33 - 40
Copyright
© EDP Sciences, 2008

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References

Tuite, E.M., Kelly, J.M., J. Photochem. Photobiol. B 21, 103 (1993) CrossRef
Law, K.Y., Chem. Rev. 93, 449 (1993) CrossRef
Kobayashi, H., Takahashi, M., Kotani, M., Chem. Phys. Lett. 349, 376 (2001) CrossRef
Zanjanchi, M.A., Sohrabnezhad, Sh., Sens. Actuators B 105, 502 (2005) CrossRef
Sheats, J.R., Antoniadis, H., Hueschen, M., Leonard, W., Miller, J., Moon, R., Roitman, D., Stocking, A., Science 273, 884 (1996) CrossRef
Horowitz, G., Adv. Mater. 10, 365 (1998) 3.0.CO;2-U>CrossRef
Milani, A., Ciammella, A.M., Degen, C., Siciliano, M., Rossi, L., J. Hepatol. 16, 369 (1992) CrossRef
Belaz-David, N., Decosterd, L.A., Appenzeller, M., Ruetsch, Y.A., Choilero, R., Buclin, T., Biollaz, J., Eur. J. Pharm. Sci. 5, 335 (1997) CrossRef
Nubbe, M.E., Adams, V.D., Moore, W.M., Water Res. 29, 1287 (1995) CrossRef
Tardivo, J.P., Del Giglio, A., de Oliveira, C.S., Gabrielli, D.S., Junqueira, H.C., Tada, D.B., Severion, D., Turchiello, R.F., Mauricio, S., Baptista, M.S., Photodiagn. Photodyn. Ther. 2, 175 (2005) CrossRef
S. Tolansky, Multiple-Beam Interferometry of Surface and Films (Oxford University, London, 1978)
Marr, H.E., Stewart, J.M., Acta Cryst. B 29, 847 (1973) CrossRef
B.D. Cullity, Elements of X-ray Diffraction (Addison-Wesley Pub., New York, 1967)
Davidson, A.T., J. Chem. Phys. 77, 162 (1982) CrossRef
A.S. Davydov, Theory of Molecular Excitons (Plenum Press, New York, 1971)
El-Nahass, M.M., Zeyada, H.M., Aziz, M.S., Makhlouf, M.M., Spectrochim. Acta A 62, 11 (2005) CrossRef
Soliman, H.S., El-Kadry, N., Ganjoum, O., El-Nahass, M.M., Darwish, H.B., Indian J. Opt. 17, 64 (1988)
Murmann, O., Z. Phys. 101, 643 (1936) CrossRef
EL-Nahass, M.M., Soliman, H.S., Kadry, N. EL., Morsy, A.Y., Yaghmour, S., J. Matt. Sci. Lett. 7, 1050 (1988) CrossRef
Shair, H.T. EL-, AL-Abawi, H., EL-Nahass, M.M., Soliman, H.S., Czech. J. Phys. 42, 695 (1992) CrossRef
Seager, C.H., Sinclair, M., McBranch, D., Heeger, A.J., Baker, G.L., Synth. Met. 49, 91 (1992) CrossRef
Arias, A.C., Granström, M., Thomas, D., Petrisch, K., Friend, R.H., Phys. Rev. B 60, 1854 (1999) CrossRef
Tzolov, M., Brütting, W., Petrova-Koch, V., Mückl, A., Berleb, S., Gmeiner, J., Schwörer, M., Synth. Met. 119, 559 (2001) CrossRef
Goris, L., Haenen, K., Nesládek, M., Wagner, P., Vanderzande, D., DeSchépper, L., J. Mat. Sci. 40, 1413 (2005) CrossRef
K. Seeger, Semiconductor Physics (Springer, Berlin, 1999)
Cahen, D., Kahn, A., Umbach, E., Materials Today 8, 32 (2005) CrossRef
J. Tauc, Amorphous and liquid semiconductors (Plenum Press, 1974), p. 178
Martienssen, H.W., J. Phys. Chem. Solids 2, 257 (1957) CrossRef
Abay, B., Güder, H.S., Efeoğlu, H., Yoğurtçu, Y.K., Semi. Sci. Technol. 15, 535 (2000) CrossRef
M.S. Dresselhaus, G. Dresselhaus, Ph. Avouris, Solid State Physics, Optical Properties of Solids (Springer-Verlag, Berlin, Germany, 2000)
Wemple, S.H., DiDomenico, M., Phys. Rev. B 3, 1338 (1971) CrossRef
Wemple, S.H., DiDomenico, M., Phys. Rev. B 7, 3767 (1973) CrossRef
Kumar, G.A., Thomas, J., George, N., Kumar, B.A., Radhakrishan, P., Nampoori, V.P.N., Vallabhan, C.P.G., Phys. Chem. Glasses 41, 89 (2000)