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Janus Microspheres for a Highly Flexible and Impregnable Water-Repelling Interface


  • This work was supported by a grant from the Creative Research Initiative Program of the Ministry of Education, Science, and Technology for “Complementary Hybridization of Optical and Fluidic Devices for Integrated Optofluidic Systems”.


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Janus microspheres composed of superhydrophobic and hydrophilic hemispherical surfaces were prepared using photocurable Pickering emulsion droplets. Upon placement at an air–water interface, an impregnable superhydrophobic barrier with high flexibility is formed. These microspheres have great potential in size-dependent semipermeable membranes, floating micromachines, and superhydrophobic coatings.