Title :
Viscous losses of shear waves in layered structures used for biosensing
Author :
Jakoby, B. ; Vellekoop, M.J.
Author_Institution :
Electron. Instrum. Lab., Delft Univ. of Technol., Netherlands
Abstract :
Love-waves have proved to be best-suited for liquid sensing applications. For (bio)chemical sensing applications, we utilize a microacoustic delay line featuring a multilayered waveguide supporting a generalized Love-wave mode. The top layer is a chemical interface, which selectively adsorbs certain target molecules in the adjacent liquid. The interface materials show viscoelastic losses leading to an unwanted damping of the wave. We analyzed the resulting losses and present illustrative results that provide design rules for the interface thickness
Keywords :
Love waves; biosensors; chemical sensors; damping; surface acoustic wave delay lines; surface acoustic wave sensors; surface acoustic wave waveguides; viscoelasticity; Love-waves; PMMA overlayer; ST quartz substrate; biochemical sensing; biosensing; chemical interface; design rules; generalized Love-wave mode; interface thickness; layered structures; liquid sensing; microacoustic delay line; multilayered waveguide; selective adsorption; shear waves; silica guiding layer; unwanted damping; viscoelastic losses; viscous losses; Biological materials; Chemicals; Crystalline materials; Damping; Delay lines; Elasticity; Oscillators; Polymer films; Surface waves; Viscosity;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762196
