Abstract
Fluorescence recovery after photobleaching (FRAP) experiments have been performed on a fluorescent dextran/poly(vinylpyrrolidone) (PVP) mixture in water. The experiments were made at several total polymer concentrations C T , from dilute to semidilute solutions (0.1-10C * ) in the homogeneous and disordered state. The composition of the «visible» polymer fluorescent dextran in the mixture was around 0.5% in the semidilute regime. The dynamics of such a system as revealed by FRAP exhibit one relaxation mode identified as a self-diffusion coefficient
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