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Drying-mediated patterns in colloid-polymer suspensions.


ABSTRACT: Drying-mediated patterning of colloidal particles is a physical phenomenon that must be understood in inkjet printing technology to obtain crack-free uniform colloidal films. Here we experimentally study the drying-mediated patterns of a model colloid-polymer suspension and specifically observe how the deposit pattern appears after droplet evaporation by varying particle size and polymer concentration. We find that at a high polymer concentration, the ring-like pattern appears in suspensions with large colloids, contrary to suppression of ring formation in suspensions with small colloids thanks to colloid-polymer interactions. We attribute this unexpected reversal behavior to hydrodynamics and size dependence of colloid-polymer interactions. This finding would be very useful in developing control of drying-mediated self-assembly to produce crack-free uniform patterns from colloidal fluids.

SUBMITTER: Ryu SA 

PROVIDER: S-EPMC5430651 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature

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Drying-mediated patterns in colloid-polymer suspensions.

Ryu Seul-A SA   Kim Jin Young JY   Kim So Youn SY   Weon Byung Mook BM  

Scientific reports 20170424 1


Drying-mediated patterning of colloidal particles is a physical phenomenon that must be understood in inkjet printing technology to obtain crack-free uniform colloidal films. Here we experimentally study the drying-mediated patterns of a model colloid-polymer suspension and specifically observe how the deposit pattern appears after droplet evaporation by varying particle size and polymer concentration. We find that at a high polymer concentration, the ring-like pattern appears in suspensions wit  ...[more]

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