Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/17385

TitleDegradation studies of transparent conductive electrodes on electroactive poly(vinylidene fluoride) for uric acid measurements
Author(s)Cardoso, V. F.
Martins, P.
Botelho, Gabriela
Rebouta, L.
Lanceros-Méndez, S.
Minas, Graça
KeywordsLab-on-a-chip
Acoustic microagitation
Beta-PVDF
IITO, AZO
ITO
AZO
β-PVDF
Issue date19-Oct-2010
PublisherIOP Publishing
JournalScience and Technology of Advanced Materials
Abstract(s)Biochemical analysis of physiological fluids using, for example, lab-on-a-chip devices requires accurate mixing of two or more fluids. This mixing can be assisted by acoustic microagitation using a piezoelectric material, such as the beta-phase of poly(vinylidene fluoride) ( beta-PVDF). If the analysis is performed using optical absorption spectroscopy and beta -PVDF is located in the optical path, the material and its conductive electrodes must be transparent. Moreover, if, to improve the transmission of the ultrasonic waves to the fluids, the piezoelectric transducer is placed inside the fluidic structures, its degradation must be assessed. In this paper, we report on the degradation properties of transparent conductive oxides, namely, indium tin oxide (ITO) and aluminum-doped zinc oxide, when they are used as electrodes for providing acoustic microagitation. The latter promotes mixing of chemicals involved in the measurement of uric acid concentration in physiological fluids. The results are compared with those for aluminum electrodes. We find that beta-PVDF samples with ITO electrodes do not degrade either with or without acoustic microagitation.
TypeArticle
URIhttp://hdl.handle.net/1822/17385
DOI10.1088/1468-6996/11/4/045006
ISSN1468-6996
Publisher versionhttp://iopscience.iop.org/
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em livros de atas/Papers in proceedings
DEI - Artigos em revistas internacionais

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