Analysis and experiment of a novel actuating design with a shear mode PZT actuator for microfluidic application

S. C. Chen, C. H. Cheng, Yi-Cheng or Y. C. Lin

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A novel actuating design that uses the shear deformation of a lead zirconate titanate (PZT) actuator to deflect a diaphragm is proposed and applied to the microfluidic system. A silicon chip is micromachined with the feature of a bulge on the diaphragm by an inductive-coupled-plasma deep-reactive-ion etcher (ICP-DRIE). The shear mode actuator glued on the chip surface pushes the bulge and thus deflects the diaphragm. The analytical exact solutions for the deflection and volume displacement of the diaphragm without fluid load are derived by the analysis of the free-body model. The results are compared with the ANSYS numerical solutions and verified by experiments, which reveals acceptable agreement. The experiment employs a two-dimensional laser scanning vibrometer to measure the diaphragm deflection. The application of this design is realized in a diffuser micropump that further functions as a microdroplet ejector with the introduction of a nozzle plate. The ejected droplets of the microejector are observed by a visualization system.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalSensors and Actuators, A: Physical
Volume135
Issue number1
DOIs
Publication statusPublished - 2007 Mar 30

Fingerprint

diaphragms
Diaphragms
Microfluidics
Actuators
actuators
shear
Experiments
deflection
chips
ejectors
vibration meters
diffusers
Silicon
Shear deformation
nozzles
Nozzles
Visualization
Ions
Scanning
Plasmas

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

Cite this

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abstract = "A novel actuating design that uses the shear deformation of a lead zirconate titanate (PZT) actuator to deflect a diaphragm is proposed and applied to the microfluidic system. A silicon chip is micromachined with the feature of a bulge on the diaphragm by an inductive-coupled-plasma deep-reactive-ion etcher (ICP-DRIE). The shear mode actuator glued on the chip surface pushes the bulge and thus deflects the diaphragm. The analytical exact solutions for the deflection and volume displacement of the diaphragm without fluid load are derived by the analysis of the free-body model. The results are compared with the ANSYS numerical solutions and verified by experiments, which reveals acceptable agreement. The experiment employs a two-dimensional laser scanning vibrometer to measure the diaphragm deflection. The application of this design is realized in a diffuser micropump that further functions as a microdroplet ejector with the introduction of a nozzle plate. The ejected droplets of the microejector are observed by a visualization system.",
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Analysis and experiment of a novel actuating design with a shear mode PZT actuator for microfluidic application. / Chen, S. C.; Cheng, C. H.; Lin, Yi-Cheng or Y. C.

In: Sensors and Actuators, A: Physical, Vol. 135, No. 1, 30.03.2007, p. 1-9.

Research output: Contribution to journalArticle

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