Simple Approach to Superamphiphobic Overhanging Silicon Nanostructures

Rajendra Kumar, Klaus Bo Mogensen, Peter Bøggild

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Superhydrophobic silicon nanostructures were fabricated by anisotropic etching of silicon coated with a thin hydrophobic layer. At certain etch parameters, overhanging nanostructures form at the apexes of the rod-shaped tips, This leads to superoleophobic behavior for several oily liquids with contact angles up to 152 degrees and roll-off angle down to 8 degrees. Such nonlithographic nanoscale overhanging Structures can also be added to silicon nanograss by deposition of a thin SiO2 layer, which equips the silicon rods with 100-300 nm sized overhanging Structures. This is a simple, fast, nonlithographic method for introducing amphiphobic behavior on a Surface consisting of vertically aligned micro- or nanostructures.
    Original languageEnglish
    JournalJournal of Physical Chemistry Part C: Nanomaterials and Interfaces
    Volume114
    Issue number7
    Pages (from-to)2936-2940
    ISSN1932-7447
    DOIs
    Publication statusPublished - 2010

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