Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-11T02:51:40.091Z Has data issue: false hasContentIssue false
  • English
  • Français

Synthesis and Spectroscopie Analysis of Smart Photochromic Materials

Published online by Cambridge University Press:  10 February 2011

Yeon-Gon Mo ,
R. O. Dillon  and
P. G. Snyder
Yeon-Gon Mo
Affiliation:
Department of Electrical Engineering and Center for Microelectronic and Optical Materials Research, University of Nebraska, Lincoln, NE, 68588
R. O. Dillon
Affiliation:
Department of Electrical Engineering and Center for Microelectronic and Optical Materials Research, University of Nebraska, Lincoln, NE, 68588
P. G. Snyder
Affiliation:
Department of Electrical Engineering and Center for Microelectronic and Optical Materials Research, University of Nebraska, Lincoln, NE, 68588
Get access

Abstract

Sol-gel processing was used to dope photochromic materials into metal alkoxide-polymer and pure polymer materials. The films on silicon and quartz substrates were examined, with and without UV irradiation, by UV/VIS spectroscopy, ellipsometry and FTIR.

The UV/VIS spectroscopy showed that the doped matrices were photochromic in the visible and near infrared.

The ellipsometric data were obtained with a variable angle of incidence spectroscopie ellipsometer (VASE). The Cauchy and a combined Cauchy-Lorentz model were used to fit the unirradiated and irradiated films, respectively. The optical constants of the films showed significant changes upon irradiation. This means that the absorption coefficient and hence the emissivity of the films is being modulated with UV irradiation. The VASE-fitted thicknesses of the films were in the range of 1 to 6 microns.

In the FTIR spectra, the spiropyran doped samples have shown IR transmission changes in the two spectral regions (6–7 μm and 7.5–8.5 μm) where changes are expected due to band opening. The transmission ratio for UV irradiated to unirradiated samples decreased by as much as about 24% at aparticular IR wavelength.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 459: Symposium Y – Materials for Smart Systems II , 1996 , 93
Copyright
Copyright © Materials Research Society 1997

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Gilat, S. L., Kawai, S. H., and Lehn, J. M., J. Chem. Soc. Chem. Commun. 1439 (1993).Google Scholar
2. Ebisawa, F., Hoshino, M., and Sugekawa, K., Appl. Phys. Lett., 65 (23), 2119 (1994).Google Scholar
3. Koshido, T., Kawai, T., and Yoshino, K., Synthetic Metals, 73, 257 (1995).Google Scholar
4. Photochromism, Molecules and Systems, Edited by Durr, H. (Elsevier, New York, 1990).Google Scholar
5. Photochromism, Techniques of Chemistry, Edited by Brown, G. H. (Wiley, New York, 1971).Google Scholar
6. Brinker, C. J. and Scherer, G. W., Sol-Gel: The Physics and Chemistry of Sol-Gel Processing (Academic Press, New York, 1990).Google Scholar
7. Scriven, L. E., in Better Ceramics Through Chemistry II, Edited by Brinker, C. J., Clark, D. E., and Ulrich, D. R. (Mat. Rec. Soc, Pittsburg, Pa., 1988).Google Scholar
8. Wenzel, M. and Atkinson, G. K., J. Am. Chem. Soc, 111, 6123 (1989).Google Scholar
9. Landry, C. J. T. et al, Polymer, 33 (7), 1496 (1992).Google Scholar
10. Krogauz, V. A. and Goldburt, E. S., Macromolecules, 14, 1382 (1981).Google Scholar
11. Fitzgerald, J. J., Landry, C. J. L., and Pochan, J. M., Macromolecules, 25, 3715 (1992).Google Scholar
12. Bradley, B. K., Fitzgerald, J. J., and Long, V. K., Macromolecules, 26, 3702 (1993).Google Scholar
13. Landry, C. J. I., Coltran, B. K., and Bradley, B. K., Polymer, 33, 1486 (1992).Google Scholar
14. Xue, S. S., Manivannan, G., and Lessard, R. A., Thin Solid Films, 253, 228 (1994).Google Scholar
15. Weiss, V., Friesem, A. A., and Krogauz, V. A., J. Appl. Phys., 74 (6), 4248 (1993).Google Scholar
16. Atassi, Y., Delaire, J. A., and Nakatani, K., J. Phys. Chem., 99, 16320 (1995).Google Scholar
17. Hayashida, S., Sato, H., and Sugawara, S., Poly. J., 18 (3), 227 (1986).Google Scholar
18. Hayashida, S., Sato, H., and Sugawara, S., Jpn. J. Appl. Phys., 24 (11), 1436 (1985).Google Scholar
19. Pittal, S., Snyder, P. G., and Ianno, N. J., Thin Solid Films, 233, 286 (1993).Google Scholar