Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Reversible Optical Information Stroage of Self-Assembled Alternating Multilayer Films: Bipolar Amphiphile-Polyelectrolyte

  • Published : 1998.11.20
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Abstract

Alternating multilayer films of a cationic bipolar amphiphile and an anionic polyelectrolyte were prepared by a self-assembly method based on electrostatic attraction between opposite charges. The bipolar amphiphile contains an azobenzene unit in order to allow for a trans-cis photoisomerization to take place. Optical birefringence or dichroism was induced in the self-assembled film upon linearly polarized light irradiation. This dichroism could be reversibly written and erased by irradiation with light of an appropriate wavelength.

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