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Characterization of Asymmetric Polydiacetylene Ultrathin Films

Published online by Cambridge University Press:  15 February 2011

D. W. Cheong ,
V. Shivshankar ,
H. C. Wang ,
C. M. Sung ,
J. Kumar  and
S. K. Tripathy
D. W. Cheong
Affiliation:
University of Massachusetts-Lowell, Department of Chemistry, Center for Advanced Materials, Lowell, MA 01854, USA
V. Shivshankar
Affiliation:
University of Massachusetts-Lowell, Department of Chemistry, Center for Advanced Materials, Lowell, MA 01854, USA
H. C. Wang
Affiliation:
University of Massachusetts-Lowell, Department of Chemistry, Center for Advanced Materials, Lowell, MA 01854, USA
C. M. Sung
Affiliation:
University of Massachusetts-Lowell, Department of Physics, Center for Advanced Materials, Lowell, MA 01854, USA
J. Kumar
Affiliation:
University of Massachusetts-Lowell, Department of Chemical Egineering, Center for Advanced Materials, Lowell, MA 01854, USA
S. K. Tripathy
Affiliation:
University of Massachusetts-Lowell, Department of Chemistry, Center for Advanced Materials, Lowell, MA 01854, USA
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Abstract

Nonlinear optical (NLO) ultrathin films of a preforrned asymmetric polydiacetylene have been fabricated by Z-type Langmuir-Blodgett film deposition from the air-water interface. Induced in-plane orientation of the polydiacetylene backbone on the substrates has been confirmed by UV/Vis, FT-IR dichroism, and degenerate four wave mixing (DFWM) studies. All the measurements indicate that the backbone is prefe rentially oriented along the dipping direction. Second harmonic generation study suggests that the LB multilayers form an asymmetric structure (Z-type) due to the accumulation of 2-dimensional ordered monolayer and the dominant induced second order polarization is in the plane of the film. The film morphology and molecular orientation have been investigated by atomic force microscopy (AFM).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 382: Symposium G – Structure and Properties of Multilayered Thin Films , 1995 , 265
Copyright
Copyright © Materials Research Society 1995

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References

REFERENCES

1. Tieke, B., Wegner, G., Naegele, D., and Ringsdorf, H., Angew. Chem. Int. Ed. Engl. 15, 764 (1976).Google Scholar
2. Tieke, B., Graf, H. J., Wegner, G., Naegele, B., Ringsdorf, H., Banerjie, S., Day, D., and Lando, J. B., Colloid. Polym. Sci., 225, 521 (1977).Google Scholar
3. Tieke, B., Weiss, K., J. Colloid and Interface Science, 101(1), 129 (1984).Google Scholar
4. Carter, G. M., Chen, Y. J., Georger, J. Jr., Hryniewicz, J., Rooney, M., Rubner, M. F., Samuelson, L. A., Sandman, D. J., Thakur, M., and Tripathy, S. K., Mol. Cryst. Liq. Cryst., 106, 259 (1984).Google Scholar
5. Bloor, D. and Chance, R. R., Polydiacetylenes. (Martinus Nijhoff, Boston, MA 9409, 1985).Google Scholar
6. Garito, A. F., Teng, C. C., Wong, K. Y., and Zammani'Khamiri, O., Mol. Cryst. Liq. Cryst., 106, 219 (1984).Google Scholar
7. Berkovic, G., Superfine, R., Guyot-Sionnest, P., Shen, Y. R., and Prasad, P. N., J. Opt. Soc. Am. B, 5(3), 668 (1988).Google Scholar
8. Ashwell, G. J., Jackson, P. D., and Crossland, W. A., Nature, 368, 438 (1994).Google Scholar
9. Prasad, P. N., Polymer, 32, 1746 (1991).Google Scholar
10. Kim, W. H., Kodali, N. B., Kumar, J., and Tripathy, S. K., Macromolecules, 27, 1819 (1994).Google Scholar
11. Rao, D. V. G. N., Aranda, Francisco J., Roach, J. F., and Remy, D., Applied Physics Letters, 58 (12), 1241 (1991).Google Scholar