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Electric‐Field‐Controlled Surface Instabilities in Soft Elastic Films
Author(s) -
Arun N.,
Sharma A.,
Shenoy V. B.,
Narayan K. S.
Publication year - 2006
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200502199
Subject(s) - materials science , electric field , stiffness , field (mathematics) , amplitude , adhesive , surface (topology) , composite material , condensed matter physics , nanotechnology , optics , physics , geometry , mathematics , layer (electronics) , quantum mechanics , pure mathematics
The surfaces of soft elastic films spontaneously form patterns . Application of an electric field above a critical value (φ cric ) to these patterns produces adhesive zones with distinct morphologies, such as pillars, large‐amplitude fingers, or complete intimate contact (see Figure). These morphology changes, governed by film parameters such as stiffness and thickness, are explained by the physics of electrostatic‐field‐induced contact instabilities.