Eur. Phys. J. Special Topics 153, 207-210 (2008)
https://doi.org/10.1140/epjst/e2008-00429-1

Lumped oscillations of a nanofilm at adhesion bond

¹ LPEC, UMR CNRS 6087, Université du Maine, 72085 Le Mans, France
² LAUM, UMR CNRS 6613, Université du Maine, 72085 Le Mans, France

Abstract

Femtosecond pump-probe laser technique has been applied for the diagnostics of a film adhesion to a substrate. A low frequency motion additional to acoustic vibrational modes of the film has been detected and related to film oscillation as a lumped mass element at a weak adhesion bond. The measurements of this low-frequency provide information on the strength of the interface. Long life time of the observed oscillation has remained unexplained.