Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.tsf.2004.08.185
Title: Novel azobenzene-containing polyamic acids as Langmuir-Blodgett-Kuhn multilayer films and for liquid crystal alignment switching
Authors: Zong, Y.
Rühe, J.
Knoll, W. 
Keywords: Bragg peak
Langmuir-Blodgett-Kuhn films
Liquid crystal alignment switching
Polyamic acids
Polyimides
Surface plasmon resonance spectroscopy
X-ray reflectivity
Issue Date: 22-Apr-2005
Source: Zong, Y., Rühe, J., Knoll, W. (2005-04-22). Novel azobenzene-containing polyamic acids as Langmuir-Blodgett-Kuhn multilayer films and for liquid crystal alignment switching. Thin Solid Films 477 (1-2) : 203-206. ScholarBank@NUS Repository. https://doi.org/10.1016/j.tsf.2004.08.185
Abstract: New azobenzene-containing polyamic acids (PAAs) with systematically tailored architectures were synthesized and assembled as Langmuir-Blodgett-Kuhn (LBK) multilayers. Surface plasmon resonance (SPR) spectroscopy was employed to measure the film thickness and its dependence upon the number of layers deposited. The pronounced Bragg peak in the X-ray reflectivity scans indicated the films' regularly repeated internal layer structure. Photoisomerization studies confirmed the excellent reversibility of the trans-cis and cis-trans isomerization reactions of the azobenzene sidegroups within the multilayer structures. Further, these films were found to be able to switch the orientation of liquid crystalline layers between homeotropic and planar alignment by the reversible photoisomerization of the azobenzene moieties. © 2004 Elsevier B.V. All rights reserved.
Source Title: Thin Solid Films
URI: http://scholarbank.nus.edu.sg/handle/10635/107295
ISSN: 00406090
DOI: 10.1016/j.tsf.2004.08.185
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