Advanced Materials

Thermal stability of Langmuir-Blodgett and self-assembled films: A possible scenario for order–disorder transitions

Authors

  • Dr. Abraham Ulman

    1. Corporate Research Laboratories, Eastman Kodak Company Rochester, New York 14650-2109 (USA)
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    • was born in Haifa, Israel in 1946. He studied chemistry at the Bar-Ilan University in Ramat-Gan, Israel and received his B.Sc. in 1969. He received his M.Sc. in phosphorus chemistry from Bar-Ilan University in 1971. After a brief period in industry, he moved to the Weizmann Institute in Rehovot, Israel, and received his Ph.D. in 1978 for work on heterosubstituted porphyrins. He then spent two years at Northwestern University in Evanston, Illinois, where his main interest was one-dimensional organic conductors. Since 1985 he has been with the Corporate Research Laboratories, of Eastman Kodak Company, in Rochester, New York, where he is currently a research associate. His research interests encompass nonlinear optics, self-assembled monolayers, and surface engineering.


Abstract

Review: The effective design of stable, ordered organic superlattices is assisted by a thorough understanding of enthalpy and entropy contributions and molecular interactions in two dimensions. Important information in this respect can be obtained by studying the thermal stability of monolayers of long-chain organic amphiphiles. Work on both LB and SA films is reviewed and a possible explanation for thermally-induced structural events (e.g. order–disorder transitions, see figure) in molecular assemblies discussed.

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