Recently we have formulated a generic Monte Carlo model for the photoinduced build up of the density grating and surface relief grating (SRG) in a model polymer matrix functionalized with azo–dyes.1 Mass transport from illuminated to dark places was demonstrated and ascribed to a hypothetical complex dynamics of polymer chains in bond–fluctuation model. This paper constitutes a first step towards verification of this hypothesis: we characterize the motion of single functionalized chain dependent on the intensity of linearly polarized light illumination. We report various regimes of diffusion of the center of mass (CM) of the chain: subdiffusion, normal diffusion and superdiffusion. Presence/absence of those regimes depends on the light intensity and on the length of the chain. We report a surprising effect in the presence of light illumination: the longer the polymer chain the stronger superdiffusion sets in.
T. Wysoczanski, A. C. Mitus, W. Radosz, and G. Pawlik, "Photoinduced (anomalous) dynamics of functionalized polymer chains: Applications for Surface Relief Grating modelling," Proc. SPIE 10101, Organic Photonic Materials and Devices XIX, 101010W (Presented at SPIE OPTO: February 01, 2017; Published: 16 February 2017); https://doi.org/10.1117/12.2252261.
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Study of self-shadowing effect as a simple means to realize nanostructured thin films and layers with special attentions to birefringent obliquely deposited thin films and photo-luminescent porous silicon