“Lock‐and‐Key” Geometry Effect of Patterned Surfaces: Wettability and Switching of Adhesive Force

Abstract

A new type of “lock-and-key” patterned surface consisting of dense arrays of microfabricated PDMS lens and bowl arrays (see image) without silanization for the wettability and switching of adhesive forces is presented. The microlens-arrayed surface (lock) shows a low contact angle and a high adhesive force following the Wenzel state, whilst the imprinted microbowl-arrayed surfaces (key), which were replicas of the microlenses, exhibit a high contact angle and an anti-adhesive behavior following the Cassie–Baxter state. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.