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

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

2005-04-14

arxiv.org/abs/cond-mat/0504362v2

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures

Scientific paper

Ten $\mu$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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