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Asymmetry in Multilayer Adhesion: the Zinc Oxide / Silver Interface

  • E. Barthel (a1), P. Nael (a1), O. Kerjan (a1) and N. Nadaud (a2)


We have developed a wedge-loaded double-cantilever beam adhesion measurement set-up for thin films deposited on glass by magnetron sputtering. Results on the Glass/ZnO/Ag/ZnO multilayer evidence that the upper Ag/ZnO interface is tougher than the lower ZnO/Ag interface. This asymmetry in the adhesion energy between identical materials is not expected from first principles. It results from different non-equilibrium interfacial structures.



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