A5031503898- Advanced Thermoelectric Materials and Devices
- Magnetic and transport properties of perovskites and related materials
- Multiferroics and related materials
- Magnetic Properties and Synthesis of Ferrites
- Advanced MEMS and NEMS Technologies
- Advanced Condensed Matter Physics
- Glass properties and applications
- Ferroelectric and Piezoelectric Materials
- Advanced Measurement and Metrology Techniques
- Microwave Dielectric Ceramics Synthesis
- Electronic and Structural Properties of Oxides
- Advanced Sensor and Energy Harvesting Materials
- Luminescence Properties of Advanced Materials
- Magneto-Optical Properties and Applications
- Graphene and Nanomaterials Applications
- Transition Metal Oxide Nanomaterials
- Force Microscopy Techniques and Applications
- Iron oxide chemistry and applications
- Metallic Glasses and Amorphous Alloys
- Conducting polymers and applications
- Advancements in Battery Materials
- Advanced Sensor Technologies Research
- Molten salt chemistry and electrochemical processes
- Bone Tissue Engineering Materials
- Nanocomposite Films for Food Packaging
University of Aveiro
2015-2024
Technische Universität Braunschweig
2010-2018
University of Edinburgh
2016
Physikalisch-Technische Bundesanstalt
2014
The work establishes a closer link between the defect chemistry and thermoelectric properties of strontium titanate-based materials, by uncovering particular roles various defects in electronic thermal transport.
Interest in producing films from renewable and biodegradable polymers, such as polysaccharides, has increased recent years with the aim of reducing environmental pollution caused by petroleum-based plastics. Additionally, combining thermoplastic property starch antioxidant antimicrobial activities chitosan is great interest to develop active materials for food packaging. This study aims preparation blended starch-chitosan mechanically reinforced reduced graphene oxide (rGO). Blending rGO...
The efforts of carrying forward superconducting materials to commercialization can be overcome by with high performance potentiated a suitable processing technique. In this work, extreme critical currents up 241 A @ 77 K were attained tuning the crystal growth in directional solidification process. Bulk rods textured Bi-2212/2.9 wt % Ag obtained changing conventional laser floating zone technique through application d.c. electrical current during crystallization Using an optimized...
Sustainably made, flexible and biocompatible composites, having environmentally friendly compositions multifunctional capabilities, are promising materials for several emerging biomedical applications. Here, the development of chitosan-based bionanocomposites with a mixed reduced graphene oxide-iron oxide (rGO-Fe3-xO4) filler is described. The prepared by one-pot synthesis, ensuring good dispersibility Fe3-xO4 nanoparticles rGO within chitosan matrix during solvent casting. resulting present...
Bionanocomposite materials have been designed as a promising route to enhance biopolymer properties, especially for food packaging application. The present study reports the preparation of bionanocomposite films alginate with different loadings pure reduced graphene oxide (rGO) or mixed zinc oxide-rGO (ZnO-rGO) fillers by solvent casting. Sepiolite is used make compatible rGO hydrophilic matrix. addition matrix maintains low water solubility promoted calcium chloride treatment, and,...
Foods with extended shelf life motivate the development of active packaging materials. The addition functional fillers to polysaccharide-based films is a promising approach. In this line, biochar-ZnO (C–ZnO) composites were obtained from sucrose and glucosamine pyrolyzed in presence ZnO particles, resulting Suc-ZnO GlcN-ZnO composites, respectively. influence different amounts (10%, 30%, 50 wt%) C–ZnO structures on properties thermoplastic starch-based was studied, demonstrating that wt%...
Yttria stabilized zirconia single crystal fibers doped with europium ions were developed envisaging optical applications. The laser floating zone technique was used in order to grow millimetric high quality fibers. as-grown are completely transparent and inclusion free, exhibiting a cubic structure. Under ultraviolet (UV) excitation, broad emission band appears at 551 nm. translucent tetragonal structure exhibit an intense red room temperature under UV excitation. fingerprint transition...
In this work, EuNbO4 samples were prepared, in the shape of fibres, by laser floating zone (LFZ) technique. The fibres grown at pulling rates below 20 mm h−1 are transparent and monophasic, crystallizing a monoclinic structure. At higher growth rates, non-stoichiometric europium orthoniobate phases promoted. physical properties analysed work electric, dielectric photoluminescence (PL) properties. For fibre 2.5 h−1, dc conductivity shows value 5.97 × 10−12 S m−1 ac conductivity, 1 MHz 300 K,...
The energetic worldwide emergency demands a significant drop in fossil energy to renewable energies as part of the sustainable solutions for global consumption. MAX phase materials, such Cr2AlC, are potential candidates heat exchanger applications due their excellent oxidation and corrosion resistance, good thermal shock response relatively high conductivity. This study uses laser surface texturing (LST) technology design plate patterns on Cr2AlC phase. Furthermore, performing numerical...
This work explores how, by redox-sensitive substitutions, the thermoelectric properties of oxides can be tuned and enhanced.
Ferrites have been widely studied for their use in the biomedical area, mostly due to magnetic properties, which gives them potential be used diagnostics, drug delivery, and treatment with hyperthermia, example. In this work, KFeO2 particles were synthesized a proteic sol-gel method using powdered coconut water as precursor; is based on principles of green chemistry. To improve its base powder obtained was subjected multiple heat treatments at temperatures between 350 1300 °C. The samples...
Fe-based materials exhibiting high dielectric constants have been attracting great attention due to their potential for application in electronic devices. In this work, iron niobate (FeNbO4) fibres were produced by the Laser Floating Zone technique, applying three different growth speeds: 5, 10 and 25 mm/h. The XRD patterns showed presence of two phases, being FeNbO4 major one all samples. effect speed is well perceptible morphology fibres. measurements revealed that samples at least...