Project/scholarship details


  • Funder

    FCT - Fundação para a Ciência e a Tecnologia, I.P.

  • Funder's country

    Portugal

  • Funding program

    5876-PPCDTI

  • Funding amount

    119,500.00 €

  • Start date

    2010-03-01

  • End date

    2013-08-31

Documents


Influence of silver content on the tribomechanical behavior on Ag-TiCN bioactiv...

Sánchez-López, J. C.; Abad, Manuel D.; Carvalho, I.; Galindo, R. Escobar; Benito, N.; Ribeiro, S.; Henriques, Mariana; Cavaleiro, A.; Carvalho, S.

Surface modification of bulk materials used in biomedical applications has become an important prerequisite for better biocompatibility. In particular, to overcome the particle generation, low-wear coatings based on carbon (nitrogen) and containing antimicrobial elements such as silver are promising candidates. Thus, the present work explores the potentialities of silver-containing carbonitride-based (Ag-TiCN) ...


Structural and electrochemical characterization of Zr–C–N–Ag coatings deposited...

Velasco, Sebastian Calderon; Lopez, V.; Alves, C. F. Almeida; Cavaleiro, A.; Carvalho, S.

ZrCN coatings with incorporated silver were deposited on 316L stainless steel by dual reactive magnetron sputtering to evaluate the silver influence on the structural properties and corrosion resistance of the films. Samples composition was assessed by electron probe microanalysis. Glow discharge optical emission spectroscopy was used to determine the distribution of silver in the films. Structural characteriza...


Prediction of optimized composition for enhanced mechanical and electrochemical...

Velasco, Sebastian Calderon; Oliveira, J. C.; Evaristo, M.; Cavaleiro, A.; Carvalho, S.

The necessity of improving the performance of existing biocompatible materials promotes the investigation of new approaches to solve biocompatibility problems caused by low chemical stability and poor mechanical performance of implanted materials. Envisioning those problems and considering the current reported complications of implanted stainless steel 316L devices, this work aimed to produce new Zr-C-N-Ag coat...


Development of antimicrobial multifunctional coatings based on Ag-Ti(C,N)

Carvalho, I.

The development of new multifunctional coatings to apply on medical biomaterials continues to be required, since materials commonly used in hip prostheses are still presenting failures. Multifunctionality is the result of a synergy, on the nanoscale level, of good corrosion resistance, mechanical and tribological properties. Additionally, a biomaterial must always be biocompatible. Besides these properties, the...


Electrochemical response of ZrCN-Ag-a(C,N) coatings in simulated body fluids

Velasco, Sebastian Calderon; Cavaleiro, A.; Carvalho, S.

In this study, Zr-C-N-Ag coatings were deposited by magnetron sputtering aiming to provide an enhanced corrosion resistance to stainless steel 316 L, while adding antibacterial capabilities using silver, a wellknown antibacterial agent. The films were analysed by X-ray diffraction, Raman spectroscopy, electron probe microanalysis and X-ray photoelectron spectroscopy (XPS) in relation to the chemical composition...


Electrochemical vs antibacterial characterization of ZrCN-Ag coatings

Velasco, Sebastian Calderon; Ferreri, Isabel; Henriques, Mariana; Cavaleiro, A.; Carvalho, S.

Nowadays, antibacterial properties are becoming a viable feature to be introduced in biomaterials due to the possibility of modifying the materials' surface used in medical devices in a micro/nano metric scale. As a result, it is mandatory to understand the mechanisms of the antimicrobial agents currently used and their possible failures. In this work, the antibacterial activity of ZrCNAg films is studied, taki...


Biotribological behavior of Ag-ZrCxN1-x coatings against UHMWPE for joint prost...

Velasco, Sebastian Calderon; Sánchez-López, J. C.; Cavaleiro, Albano; Carvalho, S.

This study aims to evaluate the structural, mechanical and tribological properties of zirconium carbonitrides (ZrCxN1-x) coatings with embedded silver nanoparticles, produced with the intention of achieving a material with enhanced multi-functional properties, including mechanical strength, corrosion resistance, tribological performance and antibacterial behavior suitable for their use in joint prostheses. The ...


Functional properties of ceramic-Ag nanocomposite coatings produced by magnetro...

Calderon Velasco, S.; Cavaleiro, A.; Carvalho, S.

In recent years, the use of nanocomposite materials to functionalize surfaces has been investigated, taking advantage of the complementary properties of the nanocomposite constituents. Among this family of materials, ceramic-Ag coatings have been widely studied due to the large variety of functionalities that silver possesses and the possibility of tuning the coating’s practical features by selecting the proper...


Antibacterial properties of multifunctional coatings Ag-ZrCN for biomedical dev...

Silva, Isabel Maria Ferreri de Gusmão e

Nowadays, with the increase of elderly population and related health problems, knee and hip joint prosthesis are being widely used worldwide. However, failure of these invasive devices is still a concern in the medical field thus demanding the revision of the surgical procedure. Within the reasons of failure are wear fatigue and microbial infections ( Staphylococcus epidermidis has emerged as one of the major n...

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