Header menu link for other important links
X
Control over coffee-ring formation in evaporating liquid drops containing ellipsoids
Venkateshwar Rao Dugyala,
Published in American Chemical Society
2014
PMID: 25003833
Volume: 30
   
Issue: 29
Pages: 8680 - 8686
Abstract
A control over the nature of deposit pattern obtained after the evaporation of solvent from a sessile drop containing dispersed materials has been demonstrated to have applications in materials engineering, separation technology, printing technology, manufacture of printed circuit boards, biology, and agriculture. In this article, we report an experimental investigation of the effect of particle shape and DLVO (Derjaguin-Landau-Verwey-Overbeek) interactions on evaporation-driven pattern formation in sessile drops. The use of a model system containing monodisperse particles where particle aspect ratio and surface charge can be adjusted reveals that a control over the nature of deposit pattern can be achieved by tuning the particle-particle and particle-substrate interactions. A clear coffee-ring formation is observed when the strength of particle-particle repulsion is higher than the particle-substrate attraction. However, complete suppression of ringlike deposits leading to a uniform film is achieved when particle-substrate and particle-particle interactions are attractive. Results illustrate that for the system of submicron ellipsoids that are hydrophilic, the nature of deposit patterns obtained after evaporation depends on the nature of interactions and not on particle shape. © 2014 American Chemical Society.
About the journal
JournalData powered by TypesetLangmuir
PublisherData powered by TypesetAmerican Chemical Society
ISSN07437463
Open AccessNo
Concepts (33)
  •  related image
    Aspect ratio
  •  related image
    Chemical reactions
  •  related image
    Drops
  •  related image
    Evaporation
  •  related image
    Experimental investigations
  •  related image
    Materials engineering
  •  related image
    Mono-disperse particles
  •  related image
    PARTICLE ASPECT RATIOS
  •  related image
    Particle-particle interactions
  •  related image
    PARTICLE-PARTICLE REPULSIONS
  •  related image
    PARTICLE-SUBSTRATE INTERACTIONS
  •  related image
    SEPARATION TECHNOLOGIES
  •  related image
    Deposits
  •  related image
    Ferric ion
  •  related image
    Ferric oxide
  •  related image
    IRON PERCHLORATE
  •  related image
    Perchlorate
  •  related image
    Phosphate
  •  related image
    Sodium dihydrogen phosphate
  •  related image
    Suspension
  •  related image
    Water
  •  related image
    Chemical phenomena
  •  related image
    Chemistry
  •  related image
    Flocculation
  •  related image
    Particle size
  •  related image
    Surface property
  •  related image
    Volatilization
  •  related image
    Ferric compounds
  •  related image
    Hydrophobic and hydrophilic interactions
  •  related image
    Perchlorates
  •  related image
    Phosphates
  •  related image
    Surface properties
  •  related image
    SUSPENSIONS