Project/scholarship details
- Project/scholarship ID
138552
- Reference
ERA-SIINN/0004/2013
- FundRef URI
- Funder
FCT - Fundação para a Ciência e a Tecnologia, I.P.
- Funder's country
Portugal
- Funding program
3599-PPCDT
- Funding amount
125,364.00 €
- Start date
2015-01-01
- End date
2018-12-31
Documents
Influence of oxygen content on the antibacterial effect of Ag-O coatings deposi...
Rebelo, R.; Calderon, V. S.; Fangueiro, Raúl; Henriques, Mariana; Carvalho, S.Ag and AgOx thin films were deposited by pulsed DC magnetron sputtering, for medical devices, in order to provide antibacterial properties. During the deposition process, oxygen flow, and, consequently, oxygen fraction, was varied (0â15 sccm) to understand the influence of oxygen species in the physical, chemical and structural properties of thin films. Coatings morphology was observed by scanning electron micr...
Evaluation of cell activation promoted by tantalum and tantalum oxide coatings ...
Moreira, Hugo; Barbosa, Augusto Alexandre Costa; Marques, Sandra Mariana Silva; Sampaio, Paula; Carvalho, S.Previous studies have shown both Ta and TaeO to be bioactive, rapidly forming a strongly-bonded surfaceadherent layer of bone-like hydroxyapatite (HAp) when immersed in simulated body fluid (SBF). Consequently, Ta and TaeO coatings are promising for the surface-modification of Ti or stainless steel endodontic endosseous implants, being conducive to a reduction in the risk of developing post-operatory infection ...
Zinc nanostructures for oxygen scavenging
Calderon, V. S.; Gomes, B.; Ferreira, P. J.; Carvalho, S.In this work, oxidation of carbon supported Zn nanostructures was studied to elucidate their utilization as oxygen scavenging materials activated by the relative humidity in the environment. Moisture-activated nano-scavengers were produced on carbon substrates using magnetron sputtering attaining nano-islands (nanoparticles), randomly distributed on the carbon surface, with arbitrary crystallographic orientatio...
Water and oil wettability of anodized 6016 aluminum alloy surface
Rodrigues, S. P.; Alves, C. F. Almeida; Cavaleiro, A.; Carvalho, S.This paper reports on the control of wettability behaviour of a 6000 series aluminum (Al) alloy surface (Al6016-T4), which is widely used in the automotive and aerospace industries. In order to induce the surface micro-nanostructuring of the surface, a combination of prior mechanical polishing steps followed by anodization process with different conditions was used. The surface polishing with sandpaper grit siz...
Development of bioactive surfaces for bone ingrowth on dental implants
Alves, Cristiana Filipa AlmeidaTese de Doutoramento - Programa Doutoral em Engenharia de Materiais; Dental implants are usually fabricated in titanium (Ti) based materials due to its biocompatibility and good corrosion resistance. However, the low ability to form a strong chemical bond with living tissue, known as bioactivity, is one of the drawbacks of Ti dental implants. Consequently, the use of dental implants is sometimes accompanied by ...
Carbon-based sputtered coatings for enhanced chitosan-based films properties
Fernandes, C. P.; Velasco, Sebastian Calderon; Giraldo, Lina Fernanda Ballesteros; Cerqueira, Miguel A.; Pastrana, L. M.; Teixeira, J. A.In order to make bio-based packaging materials competitive in comparison to petroleum-based one, some of their properties need to be improved, among which gas permeability is of crucial importance. Thus, in this work, carbon-based coatings were applied on chitosan-based films by radiofrequency reactive magnetron sputtering aiming to improve their barrier properties. Chemical and morphological properties were ev...
Development of antimicrobial leather modified with AgTiO2 nanoparticles for foo...
Carvalho, Isabel; Ferdov, S.; Mansilla, C.; Marques, S.; Cerqueira, M. A.; Pastrana, L. M.; Henriques, Mariana; Gaidau, C.; Ferreira, P.; Carvalho, S.The proposed work aims to functionalize leathers for footwear industry with antimicrobial properties based on AgTiO2 nanoparticles. The synthesis of nanoparticles was carried out by the hydrothermal method with significant advantages in terms of time, energy savings and low cost. Anatase TiO2 nanoparticles with dimensions below 10nm were obtained as observed by X-ray diffraction and transmission electron micros...
Galvanic oxidation of bimetallic Zn-Fe nanoparticles for oxygen scavenging
Castro, A.; Carvalho, I.; Marques, L.; Ferreira, P. J.; Cavaleiro, A.; Carvalho, S.; Velasco, Sebastian CalderonBimetallic nanoparticles (NP) have demonstrated outstanding multifunctional characteristics, which depend on their size, distribution and composition. In this study, we show the possibility of tailoring the oxidation behavior of Zn-Fe bimetallic nanoparticles produced by magnetron sputtering and gas agglomeration system. Zn and Fe metals were coupled to promote faster oxidation of Zn, stimulating a galvanic mec...
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