TY - JOUR
T1 - Controlled Uniform Coating from the Interplay of Marangoni Flows and Surface-Adsorbed Macromolecules
AU - Kim, Hyoungsoo
AU - Boulogne, François
AU - Um, Eujin
AU - Jacobi, Ian
AU - Button, Ernie
AU - Stone, Howard A.
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/3/24
Y1 - 2016/3/24
N2 - Surface coatings and patterning technologies are essential for various physicochemical applications. In this Letter, we describe key parameters to achieve uniform particle coatings from binary solutions. First, multiple sequential Marangoni flows, set by solute and surfactant simultaneously, prevent nonuniform particle distributions and continuously mix suspended materials during droplet evaporation. Second, we show the importance of particle-surface interactions that can be established by surface-adsorbed macromolecules. To achieve a uniform deposit in a binary mixture, a small concentration of surfactant and surface-adsorbed polymer (0.05 wt% each) is sufficient, which offers a new physicochemical avenue for control of coatings.
AB - Surface coatings and patterning technologies are essential for various physicochemical applications. In this Letter, we describe key parameters to achieve uniform particle coatings from binary solutions. First, multiple sequential Marangoni flows, set by solute and surfactant simultaneously, prevent nonuniform particle distributions and continuously mix suspended materials during droplet evaporation. Second, we show the importance of particle-surface interactions that can be established by surface-adsorbed macromolecules. To achieve a uniform deposit in a binary mixture, a small concentration of surfactant and surface-adsorbed polymer (0.05 wt% each) is sufficient, which offers a new physicochemical avenue for control of coatings.
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U2 - 10.1103/PhysRevLett.116.124501
DO - 10.1103/PhysRevLett.116.124501
M3 - Article
C2 - 27058080
AN - SCOPUS:84962467949
SN - 0031-9007
VL - 116
JO - Physical review letters
JF - Physical review letters
IS - 12
M1 - 124501
ER -