Interfacial aggregation of self-propelled Janus colloids in sessile droplets
Maziyar Jalaal, Borge ten Hagen, Hai le The, Christian Diddens, Detlef Lohse, Alvaro Marin
Abstract
Many living microorganisms experience an affinity to populate boundaries. The reasons for such affinity can be complex. Here we show that a simple synthetic microswimmer (Janus catalytic colloidal particles) tends to accumulate in the vicinity of liquid interfaces in sessile droplets. We show that the main mechanism is related to their active swimming motion, which is dominating even in the presence of evaporation-driven flows within the sessile droplet.
Topics & Concepts
JanusColloidChemical physicsEvaporationColloidal particleJanus particlesNanotechnologySolid surfaceMaterials scienceChemistryPhysicsThermodynamicsPhysical chemistryMicro and Nano RoboticsPickering emulsions and particle stabilizationInnovative Microfluidic and Catalytic Techniques Innovation