Journal
PHYSICAL REVIEW LETTERS
Volume 116, Issue 12, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.116.124501
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Funding
- DOE [DE-SC0008598]
- People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7) under REA Grant [623541]
- U.S. Department of Energy (DOE) [DE-SC0008598] Funding Source: U.S. Department of Energy (DOE)
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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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