Electric-Field-Controlled Surface Instabilities in Soft Elastic Films

Authors


  • A. S. and V. B. S. acknowledge the support of DST, India, Nanoscience and Technology Program.

Abstract

original image

The surfaces of soft elastic films spontaneously form patterns. Application of an electric field above a critical value (φcric) 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.

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