Micro-wrinkling and delamination-induced buckling of stretchable electronic structures

O. K. Oyewole, D. Yu, J. Du, J. Asare, D. O. Oyewole, V. C. Anye, A. Fashina, M. G. Zebaze Kana, W. O. Soboyejo

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16 Scopus citations

Abstract

This paper presents the results of experimental and theoretical/computational micro-wrinkles and buckling on the surfaces of stretchable poly-dimethylsiloxane (PDMS) coated with nano-scale Gold (Au) layers. The wrinkles and buckles are formed by the unloading of pre-stretched PDMS/Au structure after the evaporation of nano-scale Au layers. They are then characterized using atomic force microscopy and scanning electron microscopy. The critical stresses required for wrinkling and buckling are analyzed using analytical models. The possible interfacial cracking that can occur along with film buckling is also studied using finite element simulations of the interfacial crack growth. The implications of the results are discussed for potential applications of micro-wrinkles and micro-buckles in stretchable electronic structures and biomedical devices.

Original languageEnglish (US)
Article number235501
JournalJournal of Applied Physics
Volume117
Issue number23
DOIs
StatePublished - Jun 21 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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