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Kim, So Youn
Laboratory for Soft Materials Nanophysics
Research Interests
  • Colloids, particle dispersions, polymer nanocomposite, block copolymers

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Crack formation and prevention in colloidal drops

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Title
Crack formation and prevention in colloidal drops
Author
Kim, Jin YoungCho, KunRyu, Seul-aKim, So YounWeon, Byung Mook
Issue Date
2015-08
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.5, pp.13166
Abstract
Crack formation is a frequent result of residual stress release from colloidal films made by the evaporation of colloidal droplets containing nanoparticles. Crack prevention is a significant task in industrial applications such as painting and inkjet printing with colloidal nanoparticles. Here, we illustrate how colloidal drops evaporate and how crack generation is dependent on the particle size and initial volume fraction, through direct visualization of the individual colloids with confocal laser microscopy. To prevent crack formation, we suggest use of a versatile method to control the colloid-polymer interactions by mixing a nonadsorbing polymer with the colloidal suspension, which is known to drive gelation of the particles with short-range attraction. Gelation-driven crack prevention is a feasible and simple method to obtain crack-free, uniform coatings through drying-mediated assembly of colloidal nanoparticles
URI
https://scholarworks.unist.ac.kr/handle/201301/16788
URL
http://www.nature.com/articles/srep13166
DOI
10.1038/srep13166
ISSN
2045-2322
Appears in Collections:
ECHE_Journal Papers
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