Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 13: POSTERS Polymer Physics
CPP 13.2: Poster
Dienstag, 24. März 2009, 14:00–16:30, P3
Dipole moment dependent investigation of Surface Relief Grating formation on azobenzene polymer thin films — •Padmanabh Veer1, Ullrich Pietsch1, Paul Rochon2, and Marina Saphiannikova3 — 1Department of Solid State Physics, University of Siegen, ENC, 57068, Siegen, Germany — 2Department of Physics, Royal Military College, Kingston, Ontario, Canada K7K5L0 — 3Leibniz Institute of Polymer Research, 01069, Dresden, Germany
The formation mechanism of surface relief gratings (SRGs) was studied in the context of dipole moment of the azobenzene material with respect to time and temperature dependent measurements. The orientation mechanism of chromophore as an initiative to the grating formation was studied insitu using continuous and pulse like exposure techniques at various temperatures upto the glass transition temperature (TG) of the respective polymer material. The results obtained for high dipole moment pDR1M and low dipole moment pMEA were compared in terms of the rate of the grating formation and related to the quantities as relaxation of the chromophores in the absence of the inscribing light and induced stress due to the chromophore orientation. The parameters obtained from the simulation data can be well explained in the frame of the viscoplastic approach. The deformation caused by the light induced movement of the azopolymer chains has found to alter the mechanical properties of the polymer material.