Paula M. Vilarinho
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View article: Role of infill density and pattern in electrical properties of fused filament fabricated mutual capacitance sensors
Role of infill density and pattern in electrical properties of fused filament fabricated mutual capacitance sensors Open
As the dynamic development of human–machine interfaces increases the demand for interactive sensors, this work demonstrates the successful fused filament fabrication of mutual capacitance sensors on acrylonitrile butadiene styrene substrat…
View article: Flash sintering of tunable dielectric Ba0.6Sr0.4TiO3 electroceramics
Flash sintering of tunable dielectric Ba0.6Sr0.4TiO3 electroceramics Open
Ba(1-x)SrxTiO3 (BST) is a crucial dielectric material in tunable devices for modern wireless communication technologies, owing to high dielectric tunability and low dielectric loss. However, the conventional processing of BST ceramics requ…
View article: Ultrafast high-temperature sintering of potassium-sodium niobate: Processing and properties
Ultrafast high-temperature sintering of potassium-sodium niobate: Processing and properties Open
Current regulations pushing for lead-free piezoelectric alternatives have highlighted potassium-sodium niobate (K0.5Na0.5NbO3, KNN) as a promising candidate. However, conventional sintering of KNN faces challenges like alkali element volat…
View article: Stimuli-Responsive Oligourea Molecular Films
Stimuli-Responsive Oligourea Molecular Films Open
We have designed and synthesized a helical cysteamine-terminated oligourea foldamer composed of ten urea residues featuring side carboxyl and amine groups. The carboxyl group is located in proximity to the C-terminus of the oligourea and h…
View article: Development of carbon quantum dots-based transparent coatings for enhanced UV shielding
Development of carbon quantum dots-based transparent coatings for enhanced UV shielding Open
The development of easy, translucent, and scalable UV-protection coatings for transparent containers is of utmost importance to ensure the safety of several food and medical products. Here it is studied the preparation of coatings based on…
View article: Exploring the low temperature fabrication and properties of barium strontium titanate tunable dielectric ceramics
Exploring the low temperature fabrication and properties of barium strontium titanate tunable dielectric ceramics Open
Ba1-xSrxTiO3 compounds are widely recognized as leading dielectric materials for tunable electronic applications. To expand their applicability and enable integration with polymers and metals, there is a need for low-temperature processing…
View article: Effect of Co Doping on the Physical Properties and Organic Pollutant Photodegradation Efficiency of ZnO Nanoparticles for Environmental Applications
Effect of Co Doping on the Physical Properties and Organic Pollutant Photodegradation Efficiency of ZnO Nanoparticles for Environmental Applications Open
This paper presents a comprehensive investigation of the synthesis and characterization of Zn1−xCoxO (0 ≤ x ≤ 0.05) nanopowders using a chemical co-precipitation approach. The structural, morphological, and vibrational properties of the re…
View article: Comparative microwave- and conventional oven-assisted hydrothermal syntheses of BaTiO3 nanoparticles for improved electroceramics
Comparative microwave- and conventional oven-assisted hydrothermal syntheses of BaTiO3 nanoparticles for improved electroceramics Open
Barium titanate (BT) nanoparticles were prepared using both microwave- and conventional oven-assisted hydrothermal syntheses with varying reaction times (1 h, 3 h, and 6 h). In the case of the conventional oven-assisted hydrothermal synthe…
View article: Quasi‐hexagonal nanopatterned porous cobalt ferrite thin films prepared via block copolymer self‐assembly
Quasi‐hexagonal nanopatterned porous cobalt ferrite thin films prepared via block copolymer self‐assembly Open
We present a novel method for fabricating dense and nanopatterned porous cobalt ferrite (CoFe 2 O 4 ) thin films with a remarkable thickness of 65 nm, achieved through direct block copolymer self‐assembly. By decomposing the block copolyme…
View article: Nanoscale Study of the Polar and Electronic Properties of a Molecular Erbium(III) Complex Observed via Scanning Probe Microscopy
Nanoscale Study of the Polar and Electronic Properties of a Molecular Erbium(III) Complex Observed via Scanning Probe Microscopy Open
We successfully synthesized millimeter-sized single crystals of the molecular erbium(III) complex Er(acac)3(cphen), where acac = acetylacetonate and cphen = 5-chloro-1,10-phenanthroline. The novelty of this work stems from the exhaustive e…
View article: The dissolution of potassium sodium niobate (KNN) in aqueous media towards sustainable electroceramics sintering
The dissolution of potassium sodium niobate (KNN) in aqueous media towards sustainable electroceramics sintering Open
K0.5Na0.5NbO3 (KNN) is as a relevant lead-free piezoelectric material due to its piezoelectric performance and a high Curie temperature. Although high-sintering temperature is required for obtaining dense KNN ceramics, it favours alkalis v…
View article: Local piezo- and ferroelectric properties of γ-glycine single crystal observed via piezoresponse force microscopy
Local piezo- and ferroelectric properties of γ-glycine single crystal observed via piezoresponse force microscopy Open
In this work, we demonstrate an approach of local mechanical polishing processing to modify the type of intrinsic piezoelectric activity of γ -glycine polymorph grown in a form of a single crystal. By using the piezoresponse force microsco…
View article: Resource efficiency and energy efficiency (REEE) in the Portuguese ceramic industry: Towards net zero carbon production
Resource efficiency and energy efficiency (REEE) in the Portuguese ceramic industry: Towards net zero carbon production Open
The Portuguese ceramic industry constitutes 0.5% of Gross Domestic Product in Portugal, far higher than most other European nations, and thus it is essential this sector is decarbonised, cost-effectively to preserve jobs and national reven…
View article: Nanostructured transparent solutions for UV-shielding: Recent developments and future challenges
Nanostructured transparent solutions for UV-shielding: Recent developments and future challenges Open
Ultraviolet (UV) radiation is known to promote health concerns that can manifest over both short and long terms. Aging, sunburn, skin cancer, and other conditions are related to UV radiation. Medication can also be negatively affected by t…
View article: Advanced Cellulose–Nanocarbon Composite Films for High-Performance Triboelectric and Piezoelectric Nanogenerators
Advanced Cellulose–Nanocarbon Composite Films for High-Performance Triboelectric and Piezoelectric Nanogenerators Open
Natural polymers such as cellulose have interesting tribo- and piezoelectric properties for paper-based energy harvesters, but their low performance in providing sufficient output power is still an impediment to a wider deployment for IoT …
View article: FLASH sintering of porcelain stoneware: Effect of composition modifications
FLASH sintering of porcelain stoneware: Effect of composition modifications Open
In this work, we have exploited FLASH sintering as an alternative sintering process in the production of porcelain stoneware. FLASH sintering of porcelain stoneware occurred at temperatures ∼ 1020 °C, for 500 V cm-1, 2 mA mm-2 in 30 s. The…
View article: Structure, Microstructure, and Dielectric Response of Polycrystalline Sr1-xZnxTiO3 Thin Films
Structure, Microstructure, and Dielectric Response of Polycrystalline Sr1-xZnxTiO3 Thin Films Open
In a view of the research interest in the high-permittivity materials, continuous enhancement of the dielectric permittivity ε′ with Zn content was reported for conventionally prepared Sr1-xZnxTiO3 ceramics with x up to 0.009, limited by t…
View article: Stress induced effects on piezoelectric polycrystalline potassium sodium niobate thin films
Stress induced effects on piezoelectric polycrystalline potassium sodium niobate thin films Open
This work reports a systematical study highlighting the impact of substrate induced stress as a key parameter for the electrical performance and phase transition temperatures of (K,Na)NbO 3 polycrystalline thin films.
View article: Atmosphere-Assisted FLASH Sintering of Nanometric Potassium Sodium Niobate
Atmosphere-Assisted FLASH Sintering of Nanometric Potassium Sodium Niobate Open
The request for extremely low-temperature and short-time sintering techniques has guided the development of alternative ceramic processing. Atmosphere-assisted FLASH sintering (AAFS) combines the direct use of electric power to packed powd…
View article: Flash Sintered Potassium Sodium Niobate: High-Performance Piezoelectric Ceramics at Low Thermal Budget Processing
Flash Sintered Potassium Sodium Niobate: High-Performance Piezoelectric Ceramics at Low Thermal Budget Processing Open
Alternative sintering technologies promise to overcome issues associated with conventional ceramic sintering such as high thermal budgets and CO2 footprint. The sintering process becomes even more relevant for alkali-based piezoelectric ce…
View article: Thickness‐Dependent High‐Temperature Piezo‐ and Ferro‐Electricity in a Fluorenone‐Based Molecular Crystal
Thickness‐Dependent High‐Temperature Piezo‐ and Ferro‐Electricity in a Fluorenone‐Based Molecular Crystal Open
Organic polar crystalline materials, featuring the merits of lightweight, flexibility, and low fabrication costs, are emerging as promising alternatives for inorganic ferroelectrics, but so far, they are not competitive. The main reasons a…
View article: Piezoelectric Flexible Materials Enabled by Hierarchically Porous Graphite
Piezoelectric Flexible Materials Enabled by Hierarchically Porous Graphite Open
first_page settings Order Article Reprints Font Type: Arial Georgia Verdana Font Size: Aa Aa Aa Line Spacing: Column Width: Background: Open AccessAbstract Piezoelectric Flexible Materials Enabled by Hierarchically Porous Graph…
View article: Hydrothermal Synthesis of Barium Titanate Nanoparticles: The Effect of the Heating System
Hydrothermal Synthesis of Barium Titanate Nanoparticles: The Effect of the Heating System Open
Open AccessAbstract Hydrothermal Synthesis of Barium Titanate Nanoparticles: The Effect of the Heating System † by Fernando Sá *, Mariana Silva, Maxim Ivanov, Alexander Tkach, Paula M. Vilarinho and Paula Ferreira Department of Materials a…
View article: Aligning Software Engineering Teaching Strategies and Practices with Industrial Needs
Aligning Software Engineering Teaching Strategies and Practices with Industrial Needs Open
Several approaches have been proposed to reduce the gap between software engineering education and the needs and practices of the software industry. Many of them aim to promote a more active learning attitude in students and provide them w…
View article: Development of 3Y-TZP-SrAl12O10 Composites by Reaction Sintering: The Threshold between Sinterability and Toughening
Development of 3Y-TZP-SrAl12O10 Composites by Reaction Sintering: The Threshold between Sinterability and Toughening Open
Alumina-toughened zirconia (ATZ) ceramics are composites that combine the excellent fracture toughness and bending strength typical of zirconia ceramics with the high hardness and wear-resistance of alumina (Al2O3) reinforcements [...]
View article: Optical Absorption of Soda-Lime Industrial Glasses Modified with UV-Absorbing Ions
Optical Absorption of Soda-Lime Industrial Glasses Modified with UV-Absorbing Ions Open
first_page settings Order Article Reprints Font Type: Arial Georgia Verdana Font Size: Aa Aa Aa Line Spacing: Column Width: Background: Open AccessAbstract Optical Absorption of Soda-Lime Industrial Glasses Modified with UV-Abs…
View article: Aluminium Anodizing Slurries as an Additive for FLASH Sintering of Alumina
Aluminium Anodizing Slurries as an Additive for FLASH Sintering of Alumina Open
first_page settings Order Article Reprints Font Type: Arial Georgia Verdana Font Size: Aa Aa Aa Line Spacing: Column Width: Background: Open AccessAbstract Aluminium Anodizing Slurries as an Additive for FLASH Sintering of Alum…
View article: Advanced Electromechanical Devices for Use in Bone Tissue Engineering
Advanced Electromechanical Devices for Use in Bone Tissue Engineering Open
first_page settings Order Article Reprints Font Type: Arial Georgia Verdana Font Size: Aa Aa Aa Line Spacing: Column Width: Background: Open AccessAbstract Advanced Electromechanical Devices for Use in Bone Tissue Engineering †…