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Hadi Izadi, Boxin Zhao, Yougun Han, Neil McManus and Alexander Penlidis Teflon hierarchical nanopillars with dry and wet adhesive properties Journal of Polymer Science Part B: Polymer Physics 50

Version of Record online: 5 APR 2012 | DOI: 10.1002/polb.23076

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The adhesive ability of geckos has been attributed to the fine hierarchical structure of their foot pads. In this work, high-aspect-ratio nanopillars terminated with a “fluffy” top layer are fabricated from a fluoropolymer (Teflon AF). The rigidity and exceptionally low surface energy of Teflon AF along with the presence of the top “fluffy” nanostructure itself effectively hinder the self-sticking of high-aspect-ratio and high-density nanopillars. These types of hierarchical nanopillars are shown to be efficient dry adhesives that can generate strong adhesion both in air and under water.

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