Dynamical visualization of "coffee stain phenomenon" in droplets of polymer solution via fluorescent microscopy.

Abstract

In the drying process of polymer solution droplets, we propose an experimental procedure for visualizing the solute concentration profile by combining the fluorescent microscopy with the lateral profile observation. We have conducted a dynamical observation of the transport process of the solute polymer toward the edge that causes the "coffee stain… (More)
DOI: 10.1021/la8017858

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