Functional superhydrophobic surfaces made of Janus micropillars

摘要: We demonstrate the fabrication of superhydrophobic surfaces consisting micropillars with hydrophobic sidewalls and hydrophilic tops, referred to as Janus micropillars. Therefore we first coat a micropillar array mono- or bilayer polymeric particles, merge particles together shield top faces while hydrophobizing walls. After removing polymer film, arrays can be selectively chemically functionalised groups. The remain even after functionalisation verified by laser scanning confocal microscopy. robustness behaviour proves that stability entrapped air cushion is determined forces acting at rim This insight should stimulate new way designing super liquid-repellent tunable liquid adhesion. In particular, combining superhydrophobicity protrusions groups may have exciting applications, including high-density microarrays for high-throughput screening bioactive molecules, cells, enzymes efficient water condensation. However, so far chemical attachment molecules has been accompanied complete wetting surface underneath. where post-functionalised retaining their properties, both promising challenging.