2-D crossed-electrode transducer arrays for ultrasonic particle manipulation

Abstract

Abstract-This paper reports research into the use of a crossed-electrode two-dimensional thick film lead zirconate titanate ultrasonic transducer array for particle manipulation under the control of electronics based on field programmable gate arrays. The array consists of 30 × 30 transducer elements defined by electrode crosspoints and works at approximately 7.25 MHz. Laser vibrometry of the array surface displacement profile demonstrates that single or multiple elements can be addressed and multiplexed with bespoke electronics. The array has also been demonstrated for particle manipulation with planar resonators. The results suggest potential to create dexterous acoustic tweezing devices with reconfigurable electronics and batch-produced screen-printed ultrasound transducer arrays with large number of elements.

Thin Film PZT-Based PMUT Arrays for Deterministic Particle Manipulation

“…While particle trapping has recently been shown to be possible with CMUTs [9,10], to date, it has not been extensively demonstrated with PMUTs. In addition, demonstrations of the important task of bulk manipulation of particles from element to element in an array has been demonstrated with MUTs only with heavy reliance on microfluidic flow, although there have been such demonstrations in bulk and thick film transducers [22,23,24,25,26]. Further, particles have been reported to agglomerate towards the center of MUT diaphragms when the MUT is excited at the fundamental resonant frequency [9,10].…”

Row–Column Addressed Arrays for Nondestructive Evaluation Applications

“…RCA arrays were originally invented for use in throughtransmission nondestructive evaluation (NDE) in order to decrease the number of elements in 2-D arrays and increase the scanning speed [3]. In addition to continued use in throughtransmission NDE [4], [5], these arrays have been used for different applications including particle manipulation [6], Manuscript photoacoustic imaging [2], and medical imaging [1]. In the simplest case, image volumes can be formed by using the assumption that each A-scan originates from a fictional element located at the intersection between the physical transmit and receive elements [ Fig.…”