Elsevier

Chemical Physics Letters

Volume 513, Issues 1–3, 6 September 2011, Pages 124-126
Chemical Physics Letters

From sticking to slipping conditions in QCM-D

https://doi.org/10.1016/j.cplett.2011.07.078Get rights and content

Abstract

Supported lipid bilayers are often studied by using quartz crystal microbalance with dissipation monitoring (QCM-D). The interpretation of the QCM-D data usually implies the no-slip boundary condition at the substrate (QCM) surface. Under certain circumstances, the oscillations of the QCM crystal may however result in the transition to slipping conditions. Employing the Frenkel–Kontorova model, we show that during this transition the amplitude of the bilayer vibrations drops in a stepwise fashion, i.e., the process can be classified as a first-order kinetic phase transition. The model allows us also to scrutinize the corresponding changes in the force between the bilayer and support and dissipation of energy.

Highlights

► Frenkel–Kontorova model of a supported lipid bilayer. ► Transition from sticking to slipping conditions in QCM-D. ► The amplitude of the bilayer oscillations drops in a stepwise fashion.

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