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Publication Detail
Drying of colloidal droplets on superhydrophobic surfaces
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Chen LF, Evans JRG
  • Publisher:
    ACADEMIC PRESS INC ELSEVIER SCIENCE
  • Publication date:
    01/11/2010
  • Pagination:
    283, 287
  • Journal:
    J COLLOID INTERF SCI
  • Volume:
    351
  • Issue:
    1
  • Print ISSN:
    0021-9797
  • Language:
    EN
  • Keywords:
    Superhydrophobic, Droplet drying, Coffee ring effect, Suspension, Spontaneous manufacturing, EVAPORATING SESSILE DROPLET, SUSPENSIONS, SUBSTRATE, MICRODROPLETS, WETTABILITY, BEHAVIOR, COPPER, PLATES, FLOW
  • Addresses:
    Evans, JRG
    UCL
    Dept Chem
    London
    WC1H 0AJ
    England
Abstract
Recent research on the flow patterns during the drying of droplets of solutions or suspensions has revealed a characteristic flow of dissolved or suspended material to the droplet periphery to produce the 'coffee ring' phenomenon. This effect was used to make ceramic well-plates by spontaneous manufacturing. Here we demonstrate that when a colloidal droplet dries on a superhydrophobic surface, the effect is rather different. Evaporation from the region adjacent to the three phase line becomes so restricted that the interior flows, and hence the final destination of particles, changes and the characteristic bowl-shape becomes inverted. (C) 2010 Elsevier Inc. All rights reserved.
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