Title :
Photoactive polyimides containing azobenzene pendent groups
Author :
Sava, Ion ; Resmerita, Ana-Maria
Author_Institution :
Petru Poni Inst. of Macromolecular Chem., Iasi
Abstract :
Azobenzene functionalised polymers are interesting and potentially useful materials for optical devices applications. The photoanisotropic azobenzene molecules upon irradiation with polarized light show photoinduced reorientation through the trans-cis-trans photoisomerisation cycles. A study concerning the surface structuration capacity of the polyimides described here was performed and the results obtained using Nd:YAG laser at 355 nm, at a incident fluence of 35mJ/cm2 are presented. The best results were obtained for 5 laser pulses, an increase of the pulse numbers leading to the diminution of the relief definition.
Keywords :
isomerisation; laser beam effects; optical polymers; photochemistry; azobenzene pendent groups; photoactive polyimides; photoanisotropic azobenzene molecules; photoinduced reorientation; polarized light irradiation; surface structuration; trans-cis-trans photoisomerisation cycles; wavelength 355 nm; Chemicals; Laser ablation; Liquid crystal polymers; Optical materials; Optical polarization; Optical polymers; Optical pulses; Photochromism; Polyimides; Temperature; azo-polyimides; photochromic behavior; structuration;
Conference_Titel :
Semiconductor Conference, 2008. CAS 2008. International
Conference_Location :
Sinaia
Print_ISBN :
978-1-4244-2004-9
DOI :
10.1109/SMICND.2008.4703403