Contact Instability in Adhesion and Debonding of Thin Elastic Films
Soft Condensed Matter
2009-11-11 v1
Abstract
Based on experiments and 3-D simulations, we show that a soft elastic film during adhesion and debonding from a rigid flat surface undergoes morphological transitions to pillars, labyrinths and cavities, all of which have the same lateral pattern length scale, close to \lambda/H ~ 3 for thick films, H > 1 micrometer. The linear stability analysis and experiments show a new thin film regime where \lambda/H \approx 3+ 2 (\gamma/3 \mu H)^(1/4) (\gamma is surface tension, \mu is shear modulus) because of significant surface energy penalty (for example, \lambda/H = 6 for H = 200 nm; \mu = 1MPa).
Keywords
Cite
@article{arxiv.cond-mat/0606680,
title = {Contact Instability in Adhesion and Debonding of Thin Elastic Films},
author = {Manoj Gonuguntla and Ashutosh Sharma and Jayati Sarkar and Subash A. Subramanian and Moniraj Ghosh and Vijay Shenoy},
journal= {arXiv preprint arXiv:cond-mat/0606680},
year = {2009}
}
Comments
Accepted for publication in Phys. Rev. Lett