66 documents found, page 1 of 7
Environmentally friendlier wireless energy power systems: the coil on a paper a...
Brito-Pereira, R.; Pereira, N.; Ribeiro, Clarisse Marta Oliveira; Lanceros-Méndez, S.; Martins, Pedro Libânio AbreuPaper is ubiquitous in everyday life and a low-cost environmentally friendly material. Thus, the printing of advanced conductive/magnetic nanomaterials on paper will allow the scalable production of flexible smart electronics, including energy-storage devices, sensors, inductors or antennas, among others, contributing towards more sustainable electronics. Particularly, wireless charging technologies are becomin...
Multifunctional magnetoelectric sensing and bending actuator response of polyme...
Fernandes, Liliana C.; Correia, Daniela Maria Silva; Tariq, Mohammad; Esperança, José M. S. S.; Martins, Pedro Libânio Abreu; Lanceros-Méndez, S.With the evolution of the digital society, the demand for miniaturized multifunctional devices has been increasing, particularly for sensors and actuators. These technological translators allow successful interaction between the physical and digital worlds. In particular, the development of smart materials with magnetoelectric (ME) properties, capable of wirelessly generating electrical signals in response to e...
Greener solvent-based processing of magnetoelectric nanocomposites
Lima, A. C.; Pereira, N.; Ribeiro, Clarisse Marta Oliveira; Lanceros-Méndez, S.; Martins, Pedro Libânio AbreuPolymer-based magnetoelectric (ME) nanocomposites are an enabling material technology for a wide range of applications in the area of digitalization strategies. Due to its highest piezoelectric response among polymers, poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) is the piezoelectric matrix most used in polymer-based ME materials with over 80% of the total reports, with the resulting composites typic...
In a search for effective giant magnetoelectric coupling: magnetically induced ...
Martins, Pedro Libânio Abreu; Lima, Ana C.; L'vov, Victor A.; Pereira, Nélson; Sratong-on, Pimpet; Hosoda, Hideki; Chernenko, VolodymyrPoly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) is a piezoelectric polymer suitable for applications in electromechanical and magnetoelectric (ME) systems. Ni-Mn-Ga alloys exhibit a giant magnetoelastic response related to their structural transformations of martensitic type, accompanied by noticeable volume changes. Together, in a thin film composite containing an ensemble of Ni-Mn-Ga particles (10 w...
Printed multifunctional magnetically activated energy harvester with sensing ca...
Brito-Pereira, R.; Ribeiro, Clarisse; Pereira, N.; Lanceros-Méndez, S.; Martins, Pedro Libânio AbreuThe exponential growth and ubiquitous use of mobile electronics supported by the Internet of Things (IoT) is leading to an increasing need of self-powered wearable electronic devices. In particular, converting electrical energy from magnetic fields is very appealing for the development of a sustainable power sources/sensing tools. Magneto-mechano-electric energy conversion is an effective way to convert magneti...
Electroactive poly(vinylidene fluoride) electrospun fiber mats coated with poly...
Hermenegildo, Bruno Filipe Costa; Ribeiro, Clarisse Marta Oliveira; Perinka, N.; Martins, Pedro Libânio Abreu; Trchová, M.; Hajná, M.; Stejskal, J.Electrospun membranes with an active response are playing an increasing role in tissue regeneration by improving the ability of the materials to mimic the cellular microenvironment during cell culture. In this context, this work reports on the development of poly(vinylidene fluoride) (PVDF) electrospun fibers coated with polyaniline (PANI) and with polypyrrole (PPy). Both PANI and PPy successfully coated the fi...
Magnetoelectric polymer-based nanocomposites with magnetically controlled antim...
Fernandes, Margarida; Martins, Pedro Libânio Abreu; Correia, Daniela M.; Carvalho, Estela; Gama, F. M.; Vazquez, Manuel; Bran, CristinaThe emergence of antimicrobial resistance is considered a public health problem due to the overuse and misuse of antibiotics which are losing efficacy toward an increasing number of microorganisms. Advanced antimicrobial strategies via development of alternative drugs and materials able to control microbial infections, especially in clinical settings, are urgently needed. In this work, nanocomposite films were ...
Theoretical optimization of magnetoelectric multilayer laminates
Martins, Pedro Libânio Abreu; Fernandez, C. S. L.; Silva, D.; Lanceros-Méndez, S.Magnetoelectric (ME) materials are becoming increasingly relevant in the development of new technologies for biomedical applications, sensors and actuators, among others. Mathematical models and simulations allow to optimize features and acquire fundamental knowledge on material properties to achieve innovative developments and devices. In this way, this work is focused on the simulation of both polymer-based a...
A facile nanoimpregnation method for preparing paper-based sensors and actuators
Brito-Pereira, R.; Tubio, C. R; Lanceros-Méndez, S.; Martins, Pedro Libânio AbreuPaper-based advanced functional materials have become the focus of intense research in recent years. Particularly, magnetic papers show strong potential for applications in a wide range of 4.0 technologies including communication, magnetic sensing, electromagnetic filtering, magnetic-based health care tools, point-of-care microfluidic devices, and security. In situ and lumen-loading, the main methods to prepare...
Deposition of Ti-Zr-O-N films by reactive magnetron sputtering of Zr target wit...
da Silva Oliveira, C.I.; Martínez Martinez, Diego; Cunha, L.; Lanceros-Méndez, S.; Martins, Pedro Libânio Abreu; Alves, E.; Barradas, N. P.In this work, we explore the addition of Ti ribbons on the racetrack of a Zr target to prepare Zr-O-N films including Ti, by reactive magnetron sputtering with a mixture of N2 and O2 as reactive gases. This approach is simple and not invasive, it avoids the modification of the target and minimizes its contamination. These films were compared in terms of chemical composition, density, film growth and crystallogr...