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Tzu Hui Seah, Guanjia Zhao and Prof. Martin Pumera Surfactant Capsules Propel Interfacial Oil Droplets: An Environmental Cleanup Strategy ChemPlusChem 78

Version of Record online: 1 MAR 2013 | DOI: 10.1002/cplu.201300011

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Coming clean: Polymer capsules of millimeter dimensions have been loaded with surfactants of negative, positive, or neutral charge, and their influence on the movement of oil droplets at the water/air interface was compared. Release of surfactant molecules from the capsule affects the surface tension γ and pulling force F (see figure) such that an oil droplet moves away from the polymer micromotor.

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