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Conductive graphene-based inks can be tailored for functional applications and, in particular, for printed electronics. Transparent, flexible, and easy printable materials are nowadays increasingly required for sensing applications. In this context, a capacitive multitouch sensing surface is developed using conductive graphene nanoparticles-based ink with carboxymethyl cellulose as a binder. The rheological properties of the ink are tailored to be printed by the screen-printing technique. The touchscreen is based on printed conductive lines and columns and thus the characteristics of the printed lines are optimized based on the line width and number of printing steps. The optimal printed conditions are 0.5 mm of width and five printing steps, leading to electrical resistance of 2.4 kΩ. The screen-printed flexible touchscreen is composed of 40 columns × 28 rows. An electric circuit and a graphic interface are also developed leading to an 8” touchscreen with multitouch capabilities and fast signal processing.
Miguel Franco; Vitor Correia; Pedro Marques; Fábio Sousa; Rui Silva; Bruno R. Figueiredo; Adriana Bernardes; Senentxu Lanceros‐Mendez; Pedro Costa. Environmentally Friendly Graphene‐Based Conductive Inks for Multitouch Capacitive Sensing Surfaces. Advanced Materials Interfaces 2021, 2100578 .
AMA StyleMiguel Franco, Vitor Correia, Pedro Marques, Fábio Sousa, Rui Silva, Bruno R. Figueiredo, Adriana Bernardes, Senentxu Lanceros‐Mendez, Pedro Costa. Environmentally Friendly Graphene‐Based Conductive Inks for Multitouch Capacitive Sensing Surfaces. Advanced Materials Interfaces. 2021; ():2100578.
Chicago/Turabian StyleMiguel Franco; Vitor Correia; Pedro Marques; Fábio Sousa; Rui Silva; Bruno R. Figueiredo; Adriana Bernardes; Senentxu Lanceros‐Mendez; Pedro Costa. 2021. "Environmentally Friendly Graphene‐Based Conductive Inks for Multitouch Capacitive Sensing Surfaces." Advanced Materials Interfaces , no. : 2100578.
Considering the high levels of materials used in the fields of electronics and energy storage systems, it is increasingly necessary to take into consideration environmental impact. Thus, it is important to develop devices based on environmentally friendlier materials and/or processes, such as additive manufacturing techniques. In this work, poly(vinylidene fluoride) (PVDF) and poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) are prepared by direct-ink-writing (DIW) by varying solvent evaporation temperature and fill density percentage. Different morphologies for both polymers are obtained, including dense films and porous membranes, as well as different electroactive β-phase content, thermal and mechanical properties. The dielectric constant and piezoelectric d33 coefficient for dense films reaches up to 16 at 1 kHz and 4 pC N−1, respectively for PVDF-HFP with a fill density of 80 and a solvent evaporation temperature of 50 °C. Porous structures are developed for battery separator membranes in lithium-ion batteries, with a highest ionic conductivity value of 3.8 mS cm−1 for the PVDF-HFP sample prepared with a fill density of 100 and a solvent evaporation temperature of 25 °C, the sample showing an excellent cycling performance. It is demonstrated that electroactive films and membranes can be prepared by direct-ink writing suitable for sensors/actuators and energy storage systems.
Rafael S. Pinto; João P. Serra; João C. Barbosa; Renato Gonçalves; Maria M. Silva; Senentxu Lanceros‐Méndez; Carlos M. Costa. Direct‐Ink‐Writing of Electroactive Polymers for Sensing and Energy Storage Applications. Macromolecular Materials and Engineering 2021, 2100372 .
AMA StyleRafael S. Pinto, João P. Serra, João C. Barbosa, Renato Gonçalves, Maria M. Silva, Senentxu Lanceros‐Méndez, Carlos M. Costa. Direct‐Ink‐Writing of Electroactive Polymers for Sensing and Energy Storage Applications. Macromolecular Materials and Engineering. 2021; ():2100372.
Chicago/Turabian StyleRafael S. Pinto; João P. Serra; João C. Barbosa; Renato Gonçalves; Maria M. Silva; Senentxu Lanceros‐Méndez; Carlos M. Costa. 2021. "Direct‐Ink‐Writing of Electroactive Polymers for Sensing and Energy Storage Applications." Macromolecular Materials and Engineering , no. : 2100372.
Hybrid materials based on ionic liquids (ILs) and polymers represent an emerging an interesting approach for an increasing number of applications, including sensors and actuators. This work reports on the development of transparent piezoionic materials based on a thermoplastic elastomer styrene-ethylene-butylene-styrene (SEBS) containing 20 wt% of the IL 1-butyl-3-methylimidazolium dicyanamide ([Bmim][N(CN)2]), suitable for pressure sensing applications. The incorporation of [Bmim][N(CN)2] within the SEBS polymer matrix induces the presence of small voids within the polymer matrix and the most significant physical-chemical changes are the increase of the electrical conductivity (1.44 × 10−14 S cm−1 to 2.94 × 10−11 ±4.2 × 10−4 S cm−1) from the pristine polymer to the hybrid material and the improved piezoresistive response, as a result of the variation of the ionic conductivity under mechanical solicitation. This piezoionic response was evaluated under loading and unloading compressive cycles with applied forces up to 5 N and 10 N. Independently of the applied force, the electrical resistance decreases with increasing pressure and shows a pressure sensitivity of approximately 25 kΩ N−1 in a dynamic range from 0 to 10 N. The suitability of the developed hybrid material as transparent pressure sensor was evaluated through the development of a touch pad prototype compatible with printing technologies.
Liliana C. Fernandes; Daniela M. Correia; Nelson Pereira; Carmen R. Tubio; Senentxu Lanceros-Méndez. Highly sensitive transparent piezoionic materials and their applicability as printable pressure sensors. Composites Science and Technology 2021, 214, 108976 .
AMA StyleLiliana C. Fernandes, Daniela M. Correia, Nelson Pereira, Carmen R. Tubio, Senentxu Lanceros-Méndez. Highly sensitive transparent piezoionic materials and their applicability as printable pressure sensors. Composites Science and Technology. 2021; 214 ():108976.
Chicago/Turabian StyleLiliana C. Fernandes; Daniela M. Correia; Nelson Pereira; Carmen R. Tubio; Senentxu Lanceros-Méndez. 2021. "Highly sensitive transparent piezoionic materials and their applicability as printable pressure sensors." Composites Science and Technology 214, no. : 108976.
Energy and environmental issue are among the most relevant challenges to be solved in the near future. Electric vehicles (EVs) will play a key role in the solution by positively contribute to these two issues. The growth of the EV market both in Europe and the rest of the World in last years, arose a relevant question: to what extent are electric vehicles eco-friendly and cost effective in comparison with internal combustion engine vehicles (ICEVs)? This work presents a comparative study between battery electric vehicles and ICEVs from different European countries, with special focus on two relevant issues: economic viability and ecological impact. It is shown that in the European Countries, the economical payback is much variable. In other countries, the economic payback can vary between travelled distances of about 2500 km (Portugal) and 335 000 km (Czech Republic). The environmental benefit is reached after relatively low travelled distances, between 30 000 km (Norway) and 190 000 km (Poland), being more evenly distributed when compared to the economical payback. It is also shown how economic and environmental benefits depend on mobility profile, being improved for longer travel distance profiles. It was concluded that the reduction of the price of the EVs is necessary to make them more competitive in the automotive market. Further, it is important to combine both economic and environmental benefits by adopting policies within the European Union to reach a more uniform reality among the different countries, with more levelled prices and revenues (incentives, fees and taxes).
C.M. Costa; J.C. Barbosa; H. Castro; R. Gonçalves; S. Lanceros-Méndez. Electric vehicles: To what extent are environmentally friendly and cost effective? – Comparative study by european countries. Renewable and Sustainable Energy Reviews 2021, 151, 111548 .
AMA StyleC.M. Costa, J.C. Barbosa, H. Castro, R. Gonçalves, S. Lanceros-Méndez. Electric vehicles: To what extent are environmentally friendly and cost effective? – Comparative study by european countries. Renewable and Sustainable Energy Reviews. 2021; 151 ():111548.
Chicago/Turabian StyleC.M. Costa; J.C. Barbosa; H. Castro; R. Gonçalves; S. Lanceros-Méndez. 2021. "Electric vehicles: To what extent are environmentally friendly and cost effective? – Comparative study by european countries." Renewable and Sustainable Energy Reviews 151, no. : 111548.
This work reports on the evaluation of the thermal degradation of poly(vinylidene fluoride) (PVDF) and PVDF co-polymer (PVDF-TrFE, PVDF-HFP and PVDF-CTFE) composite films with different imidazolium ionic liquids (ILs). The influence of the IL type, including cation and anion type, cation chain length and content up to 40 wt% were evaluated. Independently of the fluorinated polymer type, all neat samples present a single degradation step. Upon the incorporation of the IL [C2mim][TFSI] into the different polymers, a decrease in the thermal stability occurs, indicating the IL imidazolium interaction with the CH2-CF2 groups of the fluorinated matrix. Further, it was stablished that the thermal stability of the composite material decreases with increasing cation chain length. The Ozawa-Flynn-Wall and Kissinger models were applied to evaluate the activation energies of the samples during isothermal experiments, showing that the thermal degradation activation energy ranges from 161 ± 6 kJ mol−1 ([C2mim][TFSI]/PVDF) to 131 ± 14 kJ mol−1 ([C2mim][TFSI]/PVDF-CTFE). No large differences were observed on the effect of IL inclusion in PVDF, PVDF-TrFE, PVDF-HFP and PVDF-CTFE polymer matrices.
J.C. Dias; D.M. Correia; C.M. Costa; G. Botelho; J.L. Vilas-Vilela; S. Lanceros-Mendez. Thermal degradation behavior of ionic liquid/ fluorinated polymer composites: Effect of polymer type and ionic liquid anion and cation. Polymer 2021, 229, 123995 .
AMA StyleJ.C. Dias, D.M. Correia, C.M. Costa, G. Botelho, J.L. Vilas-Vilela, S. Lanceros-Mendez. Thermal degradation behavior of ionic liquid/ fluorinated polymer composites: Effect of polymer type and ionic liquid anion and cation. Polymer. 2021; 229 ():123995.
Chicago/Turabian StyleJ.C. Dias; D.M. Correia; C.M. Costa; G. Botelho; J.L. Vilas-Vilela; S. Lanceros-Mendez. 2021. "Thermal degradation behavior of ionic liquid/ fluorinated polymer composites: Effect of polymer type and ionic liquid anion and cation." Polymer 229, no. : 123995.
Ricardo Brito‐Pereira; Carmen Rial Tubio; Senentxu Lanceros‐Mendez; Pedro Martins. A Facile Nanoimpregnation Method for Preparing Paper‐Based Sensors and Actuators. Advanced Materials Technologies 2021, 1 .
AMA StyleRicardo Brito‐Pereira, Carmen Rial Tubio, Senentxu Lanceros‐Mendez, Pedro Martins. A Facile Nanoimpregnation Method for Preparing Paper‐Based Sensors and Actuators. Advanced Materials Technologies. 2021; ():1.
Chicago/Turabian StyleRicardo Brito‐Pereira; Carmen Rial Tubio; Senentxu Lanceros‐Mendez; Pedro Martins. 2021. "A Facile Nanoimpregnation Method for Preparing Paper‐Based Sensors and Actuators." Advanced Materials Technologies , no. : 1.
This review summarizes the main concepts, technologies and recent reports that allow interconnecting printing technologies with magnetoactive materials.
Karla Marina Jaimes Merazzo; A. C. Lima; Mikel Rincón Iglesias; Liliana Fernandes; Nelson Pereira; Senentxu Lanceros-Mendez; Pedro Martins. Magnetic materials: a journey from finding north to an exciting printed future. Materials Horizons 2021, 1 .
AMA StyleKarla Marina Jaimes Merazzo, A. C. Lima, Mikel Rincón Iglesias, Liliana Fernandes, Nelson Pereira, Senentxu Lanceros-Mendez, Pedro Martins. Magnetic materials: a journey from finding north to an exciting printed future. Materials Horizons. 2021; ():1.
Chicago/Turabian StyleKarla Marina Jaimes Merazzo; A. C. Lima; Mikel Rincón Iglesias; Liliana Fernandes; Nelson Pereira; Senentxu Lanceros-Mendez; Pedro Martins. 2021. "Magnetic materials: a journey from finding north to an exciting printed future." Materials Horizons , no. : 1.
Magnetorheological elastomers are hybrid materials consisting of an inorganic magnetic nanofiller embedded into an elastomeric polymer matrix. Their magnetically activated properties have applications in different fields such as robotics, magnetic storage devices, sensors, and actuators, essential for the Internet of Things and digitalization paradigms. The cover by Carmen Rial Tubio, and co-workers, article number 2100240, depicts a scanning electron microscope of an MRE, highlighting components and applications.
Ander García Díez; Carmen Rial Tubio; Jon Gutiérrez Etxebarria; Senentxu Lanceros-Mendez. Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives. Advanced Engineering Materials 2021, 23, 2170023 .
AMA StyleAnder García Díez, Carmen Rial Tubio, Jon Gutiérrez Etxebarria, Senentxu Lanceros-Mendez. Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives. Advanced Engineering Materials. 2021; 23 (6):2170023.
Chicago/Turabian StyleAnder García Díez; Carmen Rial Tubio; Jon Gutiérrez Etxebarria; Senentxu Lanceros-Mendez. 2021. "Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives." Advanced Engineering Materials 23, no. 6: 2170023.
In order to advance towards more sustainable electronics generation, natural polymers with tailored dielectric response are essential. In this search, the combination of bio-based materials with active fillers in composite form, suppose one of the most viable alternatives. To achieve it, this work has explored the ability to control dielectric response of Silk Fibroin, a protein polymer by its combination with ceramic barium titanate (BaTiO3) nanoparticles. Both the effect of filler concentration (0, 5, 10, 20 and 40 wt%) and size (100 and 200 nm) has been studied in composites processed by easily scalable techniques. Samples with a homogeneous distribution of nanoparticles have been obtained. Dielectric relaxation processes assessed by broadband dielectric relaxation spectroscopy (BDS) in wide frequency (0.1 Hz–1 MHz) and temperature ranges (- 40 to 220 °C), revealed a dielectric constant increasing with filler content and decreasing with filler size, ranging from 4.4 for SF up to 142 for the SF/BaTiO3 composite with 40 wt %, at room temperature and 1 kHz. Two relaxations processes are observed, the β-relaxation and the conductivity relaxation, both with temperature-dependent behaviour. The activation energy of the conductivity process decreases with increasing nanoparticle content and decreasing size. A Maxwell-Wagner-Sillar process related to the interface between the silk fibroin matrix and the BaTiO3 nanoparticles was also identified.
C.M. Costa; A. Reizabal; R. Sabater i Serra; A. Andrio Balado; L. Pérez-Álvarez; J.L. Gómez Ribelles; J.L. Vilas-Vilela; S. Lanceros-Méndez. Broadband Dielectric Response of Silk Fibroin/BaTiO3 Composites: Influence of Nanoparticle Size and Concentration. Composites Science and Technology 2021, 213, 108927 .
AMA StyleC.M. Costa, A. Reizabal, R. Sabater i Serra, A. Andrio Balado, L. Pérez-Álvarez, J.L. Gómez Ribelles, J.L. Vilas-Vilela, S. Lanceros-Méndez. Broadband Dielectric Response of Silk Fibroin/BaTiO3 Composites: Influence of Nanoparticle Size and Concentration. Composites Science and Technology. 2021; 213 ():108927.
Chicago/Turabian StyleC.M. Costa; A. Reizabal; R. Sabater i Serra; A. Andrio Balado; L. Pérez-Álvarez; J.L. Gómez Ribelles; J.L. Vilas-Vilela; S. Lanceros-Méndez. 2021. "Broadband Dielectric Response of Silk Fibroin/BaTiO3 Composites: Influence of Nanoparticle Size and Concentration." Composites Science and Technology 213, no. : 108927.
Pedro Costa; Jose Dios; J. Cardoso; J. Campo; C. R. Tubio; B. Gonçalves; N. Castro; Senentxu Lanceros-Mendez. Polycarbonate based multifunctional self-sensing 2D and 3D printed structures for aeronautic applications. Smart Materials and Structures 2021, 1 .
AMA StylePedro Costa, Jose Dios, J. Cardoso, J. Campo, C. R. Tubio, B. Gonçalves, N. Castro, Senentxu Lanceros-Mendez. Polycarbonate based multifunctional self-sensing 2D and 3D printed structures for aeronautic applications. Smart Materials and Structures. 2021; ():1.
Chicago/Turabian StylePedro Costa; Jose Dios; J. Cardoso; J. Campo; C. R. Tubio; B. Gonçalves; N. Castro; Senentxu Lanceros-Mendez. 2021. "Polycarbonate based multifunctional self-sensing 2D and 3D printed structures for aeronautic applications." Smart Materials and Structures , no. : 1.
Summary Lithium-ion batteries (LIBs) are currently the fastest growing segment of the global battery market, and the preferred electrochemical energy storage system for portable applications. Magnetism is one of the forces that can be applied improve performance, since the application of magnetic fields influences electrochemical reactions through variation of electrolyte properties, mass transportation, electrode kinetics, and deposits morphology. This review provides a description of the magnetic forces present in electrochemical reactions and focuses on how those forces may be taken advantage of to influence the LIBs components (electrolyte, electrodes, and active materials), improving battery performance. The different ways that magnetic forces can interact with LIBs components are discussed, as well as their influence on the electrochemical behavior. The suitable control of these forces and interactions can lead to higher performance LIBs structures and to the development of innovative concepts.
Carlos M. Costa; Karla J. Merazzo; Renato Gonçalves; Charles Amos; Senentxu Lanceros-Méndez. Magnetically active lithium-ion batteries towards battery performance improvement. iScience 2021, 24, 1 .
AMA StyleCarlos M. Costa, Karla J. Merazzo, Renato Gonçalves, Charles Amos, Senentxu Lanceros-Méndez. Magnetically active lithium-ion batteries towards battery performance improvement. iScience. 2021; 24 (6):1.
Chicago/Turabian StyleCarlos M. Costa; Karla J. Merazzo; Renato Gonçalves; Charles Amos; Senentxu Lanceros-Méndez. 2021. "Magnetically active lithium-ion batteries towards battery performance improvement." iScience 24, no. 6: 1.
Environmental issues related to energy consumption are mainly associated with the strong dependence on fossil fuels. To solve these issues, renewable energy sources systems have been developed as well as advanced energy storage systems. Batteries are the main storage system related to mobility, and they are applied in devices such as laptops, cell phones, and electric vehicles. Lithium-ion batteries (LIBs) are the most used battery system based on their high specific capacity, long cycle life, and no memory effects. This rapidly evolving field urges for a systematic comparative compilation of the most recent developments on battery technology in order to keep up with the growing number of materials, strategies, and battery performance data, allowing the design of future developments in the field. Thus, this review focuses on the different materials recently developed for the different battery components—anode, cathode, and separator/electrolyte—in order to further improve LIB systems. Moreover, solid polymer electrolytes (SPE) for LIBs are also highlighted. Together with the study of new advanced materials, materials modification by doping or synthesis, the combination of different materials, fillers addition, size manipulation, or the use of high ionic conductor materials are also presented as effective methods to enhance the electrochemical properties of LIBs. Finally, it is also shown that the development of advanced materials is not only focused on improving efficiency but also on the application of more environmentally friendly materials.
João Barbosa; Renato Gonçalves; Carlos Costa; Senentxu Lanceros-Mendez. Recent Advances on Materials for Lithium-Ion Batteries. Energies 2021, 14, 3145 .
AMA StyleJoão Barbosa, Renato Gonçalves, Carlos Costa, Senentxu Lanceros-Mendez. Recent Advances on Materials for Lithium-Ion Batteries. Energies. 2021; 14 (11):3145.
Chicago/Turabian StyleJoão Barbosa; Renato Gonçalves; Carlos Costa; Senentxu Lanceros-Mendez. 2021. "Recent Advances on Materials for Lithium-Ion Batteries." Energies 14, no. 11: 3145.
The application of microporous structures as active fillers for solid polymer electrolytes (SPEs) affects battery performance and this review presents the state of the art of microporous materials (MOFs and zeolites) for SPE in solid-state batteries.
João C. Barbosa; Renato Gonçalves; Carlos M. Costa; Verónica De Zea Bermudez; Arkaitz Fidalgo-Marijuan; Qi Zhang; Senentxu Lanceros-Méndez. Metal–organic frameworks and zeolite materials as active fillers for lithium-ion battery solid polymer electrolytes. Materials Advances 2021, 2, 3790 -3805.
AMA StyleJoão C. Barbosa, Renato Gonçalves, Carlos M. Costa, Verónica De Zea Bermudez, Arkaitz Fidalgo-Marijuan, Qi Zhang, Senentxu Lanceros-Méndez. Metal–organic frameworks and zeolite materials as active fillers for lithium-ion battery solid polymer electrolytes. Materials Advances. 2021; 2 (12):3790-3805.
Chicago/Turabian StyleJoão C. Barbosa; Renato Gonçalves; Carlos M. Costa; Verónica De Zea Bermudez; Arkaitz Fidalgo-Marijuan; Qi Zhang; Senentxu Lanceros-Méndez. 2021. "Metal–organic frameworks and zeolite materials as active fillers for lithium-ion battery solid polymer electrolytes." Materials Advances 2, no. 12: 3790-3805.
The growing demand for improved performance, miniaturization and more environmental friendlier devices lead to the search for better materials and processing techniques. Ionic liquid-polymer hybrid materials allow the development of advanced materials suitable for sensors and actuators compatible with additive manufacturing techniques, allowing reduced materials waste and the fabrication of materials in a variety of shapes. In this work, ionic liquids (ILs) blended with poly(vinylidene fluoride) (PVDF) were prepared by doctor blade and direct ink writing. The selected ILs were 1-butyl-3-methylimidazolium dicyanamide [Bmim][N(CN)2] and 1-butyl-3-methylimidazolium thiocyanate [Bmim][SCN], based on their high conductivity value. The effects on microstructure, morphology, thermal, mechanical and electrochemical properties were evaluated, together with the actuator bending. It is shown that the printing process limits the PVDF spherulites growth, leading to lower degrees of crystallinity, which increase the ionic conductivity of the samples. The electromechanical measurements demonstrate the suitability of the developed samples to be applied as actuators, the highest displacement (7.5 mm) being obtained for [Bmim][N(CN)2]/PVDF for an applied voltage of 4 Vpp at a frequency of 0.1 Hz. The large bending (2%) is in line with the best results in the literature, confirming the suitability of printing technologies for the fabrication of high-performance soft actuators.
Daniela M. Correia; João C. Barbosa; João P. Serra; Rafael S. Pinto; Liliana C. Fernandes; Carmen R. Tubio; Senentxu Lanceros-Mendez; Carlos M. Costa. Comparative Assessment of Ionic Liquid‐Based Soft Actuators Prepared by Film Casting Versus Direct Ink Writing. Advanced Engineering Materials 2021, 2100411 .
AMA StyleDaniela M. Correia, João C. Barbosa, João P. Serra, Rafael S. Pinto, Liliana C. Fernandes, Carmen R. Tubio, Senentxu Lanceros-Mendez, Carlos M. Costa. Comparative Assessment of Ionic Liquid‐Based Soft Actuators Prepared by Film Casting Versus Direct Ink Writing. Advanced Engineering Materials. 2021; ():2100411.
Chicago/Turabian StyleDaniela M. Correia; João C. Barbosa; João P. Serra; Rafael S. Pinto; Liliana C. Fernandes; Carmen R. Tubio; Senentxu Lanceros-Mendez; Carlos M. Costa. 2021. "Comparative Assessment of Ionic Liquid‐Based Soft Actuators Prepared by Film Casting Versus Direct Ink Writing." Advanced Engineering Materials , no. : 2100411.
Magnetorheological elastomers based on the combination of a polymeric matrix with magnetic fillers allow the possibility of controlling their mechanical properties when an external magnetic field is applied. This so‐called magnetorheological effect can be exploited for a variety of applications. Herein, a comprehensive outlook at the state of the art is provided, in terms of the materials, effects, and applications. The physical effects that result in the magnetorheological effect are described, both from a micro and phenomenological points of view. Then, the possible combinations of different polymeric matrices and magnetic fillers, along with other additives, are presented, allowing to tune the mechanical properties, mainly dependent on the polymer matrix, and the magnetic field response, which is related to the magnetic filler. Finally, representative applications of magnetorheological elastomers are presented. This review represents an up‐to‐date state‐of‐the‐art in the field of magnetorheological elastomers as a ground to highlight the main achievements and point the specific needs to improve their response and applicability by further tuning materials and configurations.
Ander García Díez; Carmen Rial Tubio; Jon Gutiérrez Etxebarria; Senentxu Lanceros-Mendez. Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives. Advanced Engineering Materials 2021, 2100240 .
AMA StyleAnder García Díez, Carmen Rial Tubio, Jon Gutiérrez Etxebarria, Senentxu Lanceros-Mendez. Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives. Advanced Engineering Materials. 2021; ():2100240.
Chicago/Turabian StyleAnder García Díez; Carmen Rial Tubio; Jon Gutiérrez Etxebarria; Senentxu Lanceros-Mendez. 2021. "Magnetorheological Elastomer‐Based Materials and Devices: State of the Art and Future Perspectives." Advanced Engineering Materials , no. : 2100240.
During the last few decades, the interest over chalcopyrite and related photovoltaics has been growing due the outstanding structural and electrical properties of the thin-film Cu(In,Ga)Se2 photoabsorber. More recently, thin film deposition through solution processing has gained increasing attention from the industry, due to the potential low-cost and high-throughput production. To this end, the elimination of the selenization procedure in the synthesis of Cu(In,Ga)Se2 nanoparticles with following dispersion into ink formulations for printing/coating deposition processes are of high relevance. However, most of the reported syntheses procedures give access to tetragonal chalcopyrite Cu(In,Ga)Se2 nanoparticles, whereas methods to obtain other structures are scarce. Herein, we report a large-scale synthesis of high-quality Cu(In,Ga)Se2 nanoparticles with wurtzite hexagonal structure, with sizes of 10–70 nm, wide absorption in visible to near-infrared regions, and [Cu]/[In + Ga] ≈ 0.8 and [Ga]/[Ga + In] ≈ 0.3 metal ratios. The inclusion of the synthesized NPs into a water-based ink formulation for screen printing deposition results in thin films with homogenous thickness of ≈4.5 µm, paving the way towards environmentally friendly roll-to-roll production of photovoltaic systems.
Bruna Gonçalves; Alec LaGrow; Sergey Pyrlin; Bryan Owens-Baird; Gabriela Botelho; Luis Marques; Marta Ramos; Kirill Kovnir; Senentxu Lanceros-Mendez; Yury Kolen’Ko. Large-Scale Synthesis of Semiconducting Cu(In,Ga)Se2 Nanoparticles for Screen Printing Application. Nanomaterials 2021, 11, 1148 .
AMA StyleBruna Gonçalves, Alec LaGrow, Sergey Pyrlin, Bryan Owens-Baird, Gabriela Botelho, Luis Marques, Marta Ramos, Kirill Kovnir, Senentxu Lanceros-Mendez, Yury Kolen’Ko. Large-Scale Synthesis of Semiconducting Cu(In,Ga)Se2 Nanoparticles for Screen Printing Application. Nanomaterials. 2021; 11 (5):1148.
Chicago/Turabian StyleBruna Gonçalves; Alec LaGrow; Sergey Pyrlin; Bryan Owens-Baird; Gabriela Botelho; Luis Marques; Marta Ramos; Kirill Kovnir; Senentxu Lanceros-Mendez; Yury Kolen’Ko. 2021. "Large-Scale Synthesis of Semiconducting Cu(In,Ga)Se2 Nanoparticles for Screen Printing Application." Nanomaterials 11, no. 5: 1148.
Magnetic materials are among the most commonly required for a wide variety of applications. Further, their fabrication and implementation by means of additive manufacturing technologies are also getting increasing attention. In this context, photocurable magnetic materials based on polyurethane acrylated (PUA) polymer and different magnetic particles including magnetite (Fe3O4), cobalt ferrite oxide (CFO) and neodymium iron boron alloy (NdFeB) have been developed. The influence of filler type and content on the photopolymerization process, sample morphology, Young modulus, electric conductivity and magnetic properties has been investigated. It is observed that increasing particle content diminishes the conversion degree, independently of the filler type. The largest effect on the conversion degree is observed for magnetite (20% degree of conversion for 6.3 wt.% filler content) and the lowest for NdFeB (99% for 6.5 wt.% sample). Fe3O4 and CFO particles form small agglomerates within the sample, which increase with filler content, whereas NdFeB shows a good degree of dispersion. Regarding the mechanical properties, a remarkable decrease on the Young modulus of the films prepared with iron oxide-based fillers is observed, while the inclusion of NdFeB shows an increase in the Young modulus. Finally, magnetic properties are characterized by an increase in the saturation magnetization and remanence with increased filler content, while the coercivity remained constant for all filler types. A maximum magnetization of 3.70, 3.50 and 49.64 emu/g is obtained for Fe3O4, CFO and NdFeB based composites. This demonstrates the possibility of easily developing materials with tailored magnetic response by means of additive manufacturing technologies.
Cristian Mendes-Felipe; Ander Garcia; Daniel Salazar; J.L. Vilas-Vilela; S. Lanceros-Mendez. Photocurable magnetic materials with tailored functional properties. Composites Part C: Open Access 2021, 5, 100143 .
AMA StyleCristian Mendes-Felipe, Ander Garcia, Daniel Salazar, J.L. Vilas-Vilela, S. Lanceros-Mendez. Photocurable magnetic materials with tailored functional properties. Composites Part C: Open Access. 2021; 5 ():100143.
Chicago/Turabian StyleCristian Mendes-Felipe; Ander Garcia; Daniel Salazar; J.L. Vilas-Vilela; S. Lanceros-Mendez. 2021. "Photocurable magnetic materials with tailored functional properties." Composites Part C: Open Access 5, no. : 100143.
Lithium-ion batteries represent one of the most suitable systems for effective energy storage for a wide range of applications, such as smartphones, laptops, electric vehicles, or even home storage systems. Among the different battery components, the separator plays an essential role in the performance of the batteries; its most relevant characteristics are (micro)structure, wettability, thermal and mechanical properties, and ionic conductivity value. This work provides a comprehensive review of the current state of the art in lithium-ion battery separator membranes based on poly(vinylidene fluoride) (PVDF) and its copolymers. The most recent developments in the last two years are presented, focusing on the different separator types that have been developed with the aim of improving wettability, thermal characteristics, and cycling behavior. The most used types of PVDF separators are composites, polymer blends, and the combination of both. Among the most common fillers, metal–organic frameworks, ionic liquids, and ceramic particles have been used for the development of PVDF-based composites and polymers such as poly(m-phenylene isophthalamide), poly(acrylonitrile), poly(tetrafluoroethylene), or poly(methyl methacrylate), for the development of polymer blends. Electrospinning is one of the most used processing techniques to improve wettability, thermal stability, and mechanical properties. The wettability of separators has been also improved by using PVDF as a coating on commercial separators. It is shown that PVDF-based battery separators can play an important role in the next generation of high-performance batteries.
Carlos M. Costa; Senentxu Lanceros-Mendez. Recent advances on battery separators based on poly(vinylidene fluoride) and its copolymers for lithium-ion battery applications. Current Opinion in Electrochemistry 2021, 29, 100752 .
AMA StyleCarlos M. Costa, Senentxu Lanceros-Mendez. Recent advances on battery separators based on poly(vinylidene fluoride) and its copolymers for lithium-ion battery applications. Current Opinion in Electrochemistry. 2021; 29 ():100752.
Chicago/Turabian StyleCarlos M. Costa; Senentxu Lanceros-Mendez. 2021. "Recent advances on battery separators based on poly(vinylidene fluoride) and its copolymers for lithium-ion battery applications." Current Opinion in Electrochemistry 29, no. : 100752.
Given the societal concerns about the use of toxic chemicals and costly fabrication of functional materials and devices for photovoltaic applications, it is important to develop alternative sustainable methodologies. Previous studies have shown that cost-effective printing fabrication of Cu(In,Ga)Se2 thin film photovoltaics represents an interesting alternative to energy-demanding vacuum-based deposition methods, commonly used to produce Cu(In,Ga)Se2 photovoltaics. To enrich the field of printed Cu(In,Ga)Se2 photoabsorber thin films and to develop associated eco-friendly solutions, two novel inks, consisting of non-toxic reagents and readily available oxide materials, are reported. Screen printing of the inks over fluorine-doped tin oxide conductive substrates followed by swift selenization of the resultant patterns provides a straightforward route to phase-pure, uniform, and compact Cu(In,Ga)Se2 films with thickness and band gap energies ranging from 2.5 µm to 3.5 µm and from 0.97 eV to 1.08 eV, respectively. The present approach represents an important step forward in the sustainable fabrication of Cu(In,Ga)Se2 photovoltaics, where the physical properties of the photoabsorber can be easily adjusted by tuning the conditions of the screen printing process and the metal ratios in the inks.
Bruna F. Gonçalves; Gabriela Botelho; Senentxu Lanceros-Méndez; Yury V. Kolen'Ko. Eco-friendly and Cost-efficient Inks for Screen-printed Fabrication of Copper Indium Gallium Diselenide Photoabsorber Thin Films. Journal of Colloid and Interface Science 2021, 598, 388 -397.
AMA StyleBruna F. Gonçalves, Gabriela Botelho, Senentxu Lanceros-Méndez, Yury V. Kolen'Ko. Eco-friendly and Cost-efficient Inks for Screen-printed Fabrication of Copper Indium Gallium Diselenide Photoabsorber Thin Films. Journal of Colloid and Interface Science. 2021; 598 ():388-397.
Chicago/Turabian StyleBruna F. Gonçalves; Gabriela Botelho; Senentxu Lanceros-Méndez; Yury V. Kolen'Ko. 2021. "Eco-friendly and Cost-efficient Inks for Screen-printed Fabrication of Copper Indium Gallium Diselenide Photoabsorber Thin Films." Journal of Colloid and Interface Science 598, no. : 388-397.
Portable analytical systems are increasingly required for clinical analysis or environmental monitoring, among others, being materials with tailored physicochemical properties among the main needs for successful functional implementation. This article describes the processing of fluorinated poly(vinylidene-co-trifluorethylene), P(VDF-TrFE), membranes with tailored morphological and physicochemical properties to be used as microfluidic substrates for portable analytical systems, commonly called point-of-care systems in the medical field. The morphology of the developed membranes includes spherulitic, porous, randomly oriented, and oriented fibers. Furthermore, the processed hydrophobic P(VDF-TrFE) membranes were post-treated by oxygen plasma to make them superhydrophilic. The influence of morphology and plasma treatment on the physicochemical properties and capillary flow rates was evaluated. Microfluidic systems were then designed and printed by wax printing for the colorimetric quantification of glucose. The systems comprise eight reaction chambers, each glucose concentration (25, 50, 75, and 100 mg dL–1) being measured in two reaction chambers separately and at the same time. The results demonstrate the suitability of the developed microfluidic substrates based on their tailorable morphology, improved capillary flow rate, wax print quality, homogeneous generation of colorimetric reaction, and excellent mechanical properties. Finally, the possibility of being reused, along with their electroactive properties, can lead to a new generation of microfluidic substrates based on fluorinated membranes.
Ricardo Brito-Pereira; André S. Macedo; Carmen R. Tubio; Senentxu Lanceros-Méndez; Vanessa F. Cardoso. Fluorinated Polymer Membranes as Advanced Substrates for Portable Analytical Systems and Their Proof of Concept for Colorimetric Bioassays. ACS Applied Materials & Interfaces 2021, 13, 18065 -18076.
AMA StyleRicardo Brito-Pereira, André S. Macedo, Carmen R. Tubio, Senentxu Lanceros-Méndez, Vanessa F. Cardoso. Fluorinated Polymer Membranes as Advanced Substrates for Portable Analytical Systems and Their Proof of Concept for Colorimetric Bioassays. ACS Applied Materials & Interfaces. 2021; 13 (15):18065-18076.
Chicago/Turabian StyleRicardo Brito-Pereira; André S. Macedo; Carmen R. Tubio; Senentxu Lanceros-Méndez; Vanessa F. Cardoso. 2021. "Fluorinated Polymer Membranes as Advanced Substrates for Portable Analytical Systems and Their Proof of Concept for Colorimetric Bioassays." ACS Applied Materials & Interfaces 13, no. 15: 18065-18076.