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TitleAg+ release inhibition from ZrCN–Ag coatings by surface agglomeration mechanism : structural characterization
Author(s)Velasco, Sebastian Calderon
Escobar Galindo, R.
Benito, N.
Palacio, C.
Cavaleiro, A.
Carvalho, S.
Issue date14-Aug-2013
PublisherIOP Publishing
JournalJournal of Physics D: Applied Physics
Abstract(s)New multifunctional materials based on well-established materials to which functional properties are added, such as antibacterial performance, have become a relevant research topic, in order to meet the requirements of today's technological advances. This paper reports the results of a detailed structural and chemical characterization study of ZrCN–Ag coatings produced by reactive magnetron sputtering, as well as the release of silver after immersion in a simulated body fluid (Hank's balanced salt solution), which mimic the material behaviour within the human body. The chemical composition was evaluated by electron probe microanalysis, x-ray photoelectron spectroscopy and Rutherford backscattering spectroscopy, whereas the structure was assessed by Raman spectroscopy and x-ray diffraction. The material exhibits a homogeneous distribution of the elements throughout the films, with a (C + N)/Zr ratio of around 1.3 and 15 at% of silver. A mixture of amorphous (a-C and CNx) and crystalline phases (ZrCN) was identified. In addition, the silver was detected to be released in less than 0.7% of the total silver in the films, occurring during the first two hours of immersion; no further release was evidenced after this period of time.
DescriptionPublished 17 July 2013
Publisher version
AccessOpen access
Appears in Collections:CDF - GRF - Artigos/Papers (with refereeing)

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