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Dynamics of micrometer-scale phase separation in a polymer mixture upon laser irradiation

Hirofumi Toyama·Hiroyuki Kitahata·Kenichi Yoshikawa
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Abstract

Ten $μ$m -sized droplets in an aqueous-two-phase system (water/ polyethylene-glycol (PEG)/ dextran) dissapear upon irradiation with a focused YAG laser. The interface of the dextran-rich droplet broadens, indicating smoothing of the concentration profile, whereas, the PEG-rich droplet shrinks and disappears. These phenomena can be described in terms of the Ginzburg-Landau free energy, by considering the laser-induced dielectric potential.

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Hirofumi Toyama, Hiroyuki Kitahata, Kenichi Yoshikawa. 2005-04-15. Dynamics of micrometer-scale phase separation in a polymer mixture upon laser irradiation. https://arxiv.org/abs/cond-mat/0504362

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