Piezoelectric Actuators for In-Liquid Particle Manipulation in Microfluidic Applications

Proceedings

Demori, Marco¹ 

关键词: acoustic wave;    in-liquid particle manipulation;    FPWs flexural plate waves;    piezoelectric actuators;   

DOI  :  10.3390/proceedings1040392

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The possibility to generate acoustic modes based on FPWs (Flexural Plate Waves) in a generic non-piezoelectric substrate for microfludic applications by means of piezoelectric actuators has been explored and described in this paper. The FPW acoustic modes are generated by means of actuators made of Lead Zirconate Titanate (PZT) layers with InterDigital Transducers (IDTs) screen-printed on alumina (Al2O3) substrate. The experimental results show that, by exciting the resonances of the actuators, circular vortex rotations are obtained in a fluid drop placed on the substrate between the IDTs. Micrometric particles dispersed in the drop allow to demonstrate that standing waves can be generated in the liquid obtaining particle accumulation along circular lines. These results suggest the possibility to employ the proposed actuators for fluid mixing and controlled positioning of dispersed particles.

【 授权许可】

CC BY