Characteristics of acoustic plate modes on rotated Y-cuts of quarts utilised for biosensing applications

Acoustic plate modes (APM) on various quartz substrates have been investiga ted in order to determine their usefulness for liquid-sensing applications. The modes have been characterized in terms of their mass sensitivity, mode separation, temperature sensitivity, and reproducibility of the experiment al results. Promising characteristics are found for rotated Y-cuts of quart z with the direction of acoustic mode propagation being perpendicular to th e X-axis of the quartz crystal. Experiments on the detection of immunochemi cal reactions are performed using different quartz APM sensors, and the res ults are compared to similar experiments utilizing APM devices on ZX-LiNbO3 .