Experimental research on piezoelectric array microjet

doi:10.1016/S0924-4247(03)00265-6

Experimental research on piezoelectric array microjet

2003-11-01

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DOI：10.1016/S0924-4247(03)00265-6

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In this paper, a new type of piezoelectric array microjet for drug delivery will be introduced. The device consists of a fluid chamber, which is formed by a piezoelectric actuator bonded to a silicon chip with nozzles. Inside the silicon, an axis-symmetric vibration mode of a piezoelectric actuator can be transferred to dynamic energy of many droplets. In order to improve performance of droplets, its configuration and boundary conditions have been optimized by ANSYS finite elements method. At the same time, its driving circuit system has also been improved. Based on optimized structure and control circuit, microjet prototype has been experimented by particle dynamic analyzer (PDA), HP4194A impedance analyzer and Polytec-300 scanning laser vibrometer. After circuit matching, the distribution of droplets is more concentrated. It can be found that upward droplets have a long band shape or small diameter, and downward droplets have a large globe shape. The experimental results have been analyzed in great detail. The available and important conclusions have been obtained for potential applications of the microjet in drug delivery. (C) 2003 Elsevier B.V. All rights reserved.

Keyword:

microjet

piezoelectric transducer

optimization

matching circuit

Experimental research on piezoelectric array microjet

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