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“Lock‐and‐Key” Geometry Effect of Patterned Surfaces: Wettability and Switching of Adhesive Force
Author(s) -
Huang XingJiu,
Kim DongHaan,
Im Maesoon,
Lee JooHyung,
Yoon J.B.,
Choi YangKyu
Publication year - 2009
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200800649
Subject(s) - microlens , wetting , adhesive , materials science , key (lock) , silanization , contact angle , lock (firearm) , contact lens , nanotechnology , composite material , lens (geology) , optics , computer science , mechanical engineering , physics , engineering , computer security , layer (electronics)
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.