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Design and fabrication of piezoelectric microactuators based on β-poly (vinylidene fluoride) films for microfluidic applications

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5 Author(s)
Cardoso, V.F. ; Algoritmi Res. Center, Univ. of Minho, Guimarães, Portugal ; Correia, R.G. ; Rocha, J.G. ; Lanceros-Mendéz, S.
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This paper reports a fabrication method for producing piezoelectric poly (vinylidene fluoride) films in their electroactive β-phase that features controlled thickness, smooth and flat surface, and high transparency. These piezoelectric films are suitable for being used as integrated microactuators, such as piezoelectric pumps and/or mixers, in microfluidic applications. Their actuation circuit design is also reported. ATR-FTIR, UV-VIS transmittance spectroscopy and SEM techniques were used for calculating the β-phase content, for determining the transparency and for evaluating the morphology of the produced β-PVDF films, respectively. β-PVDF films with a thickness of about 25 μm were deposited by spin-coating. It was concluded that the processing parameter that mostly affect the films quality was their drying temperature. Indeed, the drying temperature of 30°C proved to be the most suitable for obtaining non-porous and transparent films, with a β-phase content of approximately 75%.

Published in:

Engineering in Medicine and Biology Society (EMBC), 2010 Annual International Conference of the IEEE

Date of Conference:

Aug. 31 2010-Sept. 4 2010

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