Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/50168

TitleTi1−xAgx electrodes deposited on polymer based sensors
Author(s)Marques, S. M.
Manninen, Nora Kristiina Alves Sousa
Ferdov, S.
Lanceros-Méndez, S.
Carvalho, S.
KeywordsSensors
Ag nanoparticles
Piezoelectric polymers
Sputtering
Issue date2014
PublisherElsevier
JournalApplied Surface Science
Abstract(s)Piezoelectric materials are interesting for the development of sensors and actuators for biomedical applications in areas such as smart prosthesis, implantable biosensors and biomechanical signal monitoring, among others. For acquiring or applying the electrical signal from/to the piezoelectric material, suitable electrodes can be produced from Ti based coatings with tailored multifunctional properties: conductivity and antibacterial characteristics through Ag inclusions. This work reports on Ti1−xAgx electrodes with different Ag/Ti atomic ratios deposited by dc and pulsed magnetron sputtering at room temperature on poly(vinylidene fluoride), PVDF. The X-ray diffraction (XRD) results revealed that the deposition conditions preserve the polymer structure and suggested the presence of crystalline Ti phase in pure titanium coating and fcc-Ag phase in pure silver coating. According to the results obtained from scanning electron microscopy (SEM) analysis, the coatings are homogeneous and no clusters were found; since -PVDF is anisotropic, the deposited coatings replicate the underlying substrate surface. Sheet resistivity values show a typical behavior of a binary alloy system, with low resistivity values for coatings of zone 1 (Ti rich) and zone 3 (Ag rich) and a slightly higher resistivity values in zone 2. The piezoelectricity of the different samples show similar values.
TypeArticle
URIhttp://hdl.handle.net/1822/50168
DOI10.1016/j.apsusc.2014.08.142
ISSN0169-4332
Publisher versionwww.elsevier.com/locate/apsusc
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CDF - GRF - Artigos/Papers (with refereeing)

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