Micro-wrinkling and delamination-induced buckling of stretchable electronic structures
2015; American Institute of Physics; Volume: 117; Issue: 23 Linguagem: Inglês
10.1063/1.4922665
ISSN1520-8850
AutoresOluwaseun K. Oyewole, Donghong Yu, Jing Du, Joseph Asare, D. O. Oyewole, Vitalis C. Anye, Adebayo A. Fashina, M. G. Zebaze Kana, Winston O. Soboyejo,
Tópico(s)Surface Modification and Superhydrophobicity
ResumoThis 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.
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