Abstract

The leaky surface acoustic wave (LSAW) velocity of thin films of lipids on a glass substrate has been investigated, using a reflection acoustic microscope at a frequency of 1 GHz. Multilayers of ω-tricosenoic acid (28–220 nm in depth), collected with the Langmuir–Blodgett technique have been deposited on silanized glass. V(z) curves have been measured, and the LSAW velocity has been calculated from them. The results point out that the velocity decreases linearly as the lipid-layer thickness increases. A theory is also presented, which gives a linear dependence between the LSAW velocity and the layer thickness.

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