Azo-polyglutamates, LBK

This work is based on collaborations with many friends and colleagues, and it is our pleasure to thank them for their support and for many helpful discussions. In particular, J. Wood participated in most of the work, Y. Geerts and K. Mullen provided the azo-silane compound, M. Biichel and S. Paul contributed to the azo-polyglutamate LBK experiments, and B. Weichart and H. Menzel from Hannover Universitat provided the azo-poiyglutamate polymers. The work on azo-polyimides was done at the University of California, Davis and IBM Almaden (San Jose) with... 

For all the azo-polyglutamate LBK-polymer films, all the WGS experiments mentioned above were repeated by setting the UV and blue lights linearly polarized, in the plane of the sample, successively parallel and perpendicular to the dipping direction the same results were obtained for both UV and blue-light directions of polarization. In other words, no photoselection effect has been detected in these LBK structures. This is in contrast to the results obtained in a spin-cast film from the Pi.io polymer used in this study, and can be due to the subtle manner of the reorientation of the azobenzenes imposed by the LBK deposition technique, because efficient photoselection, following photoisomerization induced reorientation, can easily be achieved in spin-casted azo-polymer films [7-13]. This effect is discussed in the next section. 

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