Encontrados 19 documentos, a visualizar página 1 de 2
Smart carbon fiber-reinforced polymer composites for damage sensing and on-line...
Lopes, Cláudia Jesus Ribeiro; Araújo, Andreia; Silva, Fernando; Pappas, Panagiotis-Nektarios; Termine, Stefania; Trompeta, Aikaterini-Flora A.High electrical conductivity, along with high piezoresistive sensitivity and stretchability, are crucial for designing and developing nanocomposite strain sensors for damage sensing and on-line structural health monitoring of smart carbon fiber-reinforced polymer (CFRP) composites. In this study, the influence of the geometric features and loadings of carbon-based nanomaterials, including reduced graphene oxide...
Effect of plasma treatment on root canal sealers’ adhesion to intraradicular de...
Ferreira, Inês; Lopes, Cláudia Jesus Ribeiro; Ferreira, Armando José Barros; Vaz, Filipe; Pina-Vaz, Irene; Martín-Biedma, BenjamínThis investigation aimed to assess, through a systematic review, the effect of non-thermal plasma treatments on root canal sealers’ adhesion to dentin. This study followed the 2020 Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A literature search was undertaken without limits on time or language, until May 2023, in PubMed–MEDLINE, Scopus, Web of Science, OpenGrey, and t...
Enhancing the longevity and functionality of Ti-Ag dry electrodes for remote bi...
Carvalho, Daniel; Marques, Sandra Mariana Silva; Siqueira, Giorgia; Ferreira, Armando José Barros; Santos, João; Geraldo, DulceThis study aims to evaluate the lifespan of Ti-Ag dry electrodes prepared using flexible polytetrafluoroethylene (PTFE) substrates. Following previous studies, the electrodes were designed to be integrated into wearables for remote electromyography (EMG) monitoring and electrical stimulation (FES) therapy. Four types of Ti-Ag electrodes were prepared by DC magnetron sputtering, using a pure-Ti target doped with...
Gas sensors based on localized surface plasmon resonances: synthesis of oxide f...
Rodrigues, Marco S.; Borges, Joel; Lopes, Cláudia Jesus Ribeiro; Pereira, Rui M. S.; Vasilevskiy, Mikhail; Vaz, F.This work presents a comprehensive review on gas sensors based on localized surface plasmon resonance (LSPR) phenomenon, including the theory of LSPR, the synthesis of nanoparticle-embedded oxide thin films, and strategies to enhance the sensitivity of these optical sensors, supported by simulations of the electromagnetic properties. The LSPR phenomenon is known to be responsible for the unique colour effects o...
Me-Doped Ti–Me intermetallic thin films used for dry biopotential electrodes: a...
Lopes, Cláudia Jesus Ribeiro; Fiedler, Patrique; Rodrigues, Marco S.; Borges, Joel; Bertollo, Maurizio; Alves, Eduardo; Barradas, Nuno PessoaIn a new era for digital health, dry electrodes for biopotential measurement enable the monitoring of essential vital functions outside of specialized healthcare centers. In this paper, a new type of nanostructured titanium-based thin film is proposed, revealing improved biopotential sensing performance and overcoming several of the limitations of conventional gel-based electrodes such as reusability, durabilit...
Surface functionalization of polypropylene (PP) by chitosan immobilization to e...
Morais, D. S.; Avila, B.; Lopes, Cláudia Jesus Ribeiro; Rodrigues, M. A.; Vaz, F.; Machado, A. V.; Fernandes, M. H.; Guedes, R. M.; Lopes, M. A.Driven by the market demand, several synthetic and natural grafts have been proposed during the last years for tendons regeneration. The synthetic grafts, which present a better mechanical performance than the natural ones, usually fail due to the lack of biocompatibility and bioactivity. Thus, chitosan (Cs) was immobilized on polypropylene (PP) surface, previously activated by plasma treatment, in order to imp...
Biological response of Ti-based intermetallic thin films, to be used as biopote...
Lopes, Cláudia Jesus Ribeiro; Gonçalves, Víctor; Costa, R.; Coffineau, Dorian; Borges, Joel; Rodrigues, Marco S.; Gomes, Andreia CBiopotential electrodes are crucial in modern preventive medicine, being the primarily responsible for the high-resolution monitoring of the bioelectrical activity of in human body. In this work, flexible dry biopotential electrodes based on binary systems of Ti-Me (Me = Al, Cu, Ag, Au) thin films were developed for non-invasive physiological monitoring. These biopotential electrodes supported by polymeric base...
Fracture resistance of Ti-Ag thin films deposited on polymeric substrates for b...
Etiemble, Aurélien; Lopes, Cláudia Jesus Ribeiro; Nkou Bouala, Galy Ingrid; Borges, Joel Nuno Pinto; Malchère, Annie; Langlois, Cyril; Vaz, F.Accepted manuscript; The ability of magnetron sputtered Ti-Ag thin films deposited on polymeric substrate to be used as sensors for biosignal acquisition is investigated. Influence of the Ag content on the microstructure of TiAgx thin films prepared by magnetron sputtering is characterized by X-ray diffraction and electron microscopies. Three characteristic composition ranges are identified: Ti-rich, Ti-Ag and ...
Thin films composed of metal nanoparticles (Au, Ag, Cu) dispersed in AlN: the i...
Domingues, R. P.; Rodrigues, Marco S.; Lopes, Cláudia Jesus Ribeiro; Pedrosa, Paulo Eduardo Teixeira Baptista; Alves, Eduardo; Barradas, Nuno P.In this work, thin films composed of gold (Au), silver (Ag), and copper (Cu) metals, dispersed in aluminium nitride (AlN), were prepared by reactive direct current magnetron sputtering, and post-deposition thermal annealing. The structure, morphology and optical response of the films were studied as a function of the composition and annealing temperature. The atomic concentration of the plasmonic metal (Au, Ag ...
Antibacterial effect and biocompatibility of a novel nanostructured ZnO-coated ...
Alves, M. J.; Grenho, L.; Lopes, Cláudia Jesus Ribeiro; Borges, Joel Nuno Pinto; Vaz, F.; Vaz, I. P.; Fernandes, M. H.This work explored a novel approach to enhance the antibacterial activity of commercial Gutta-percha (GP) cones, the most commonly used core filling materials used in endodontic treatment. The reported procedure involved an argon (Ar) plasma treatment (PT) of the GP cone surface, followed by the deposition of a ZnO thin film by magnetron sputtering. The resulting surfaces were evaluated for surface topography, ...