A5059346504- ZnO doping and properties
- Thin-Film Transistor Technologies
- Transition Metal Oxide Nanomaterials
- Semiconductor materials and devices
- Gas Sensing Nanomaterials and Sensors
- Analytical Chemistry and Sensors
- Copper-based nanomaterials and applications
- Advanced Memory and Neural Computing
- Advanced Photocatalysis Techniques
- Catalytic Processes in Materials Science
- Advanced Sensor and Energy Harvesting Materials
- Advanced biosensing and bioanalysis techniques
- Biosensors and Analytical Detection
- Acoustic Wave Resonator Technologies
- Organometallic Complex Synthesis and Catalysis
- Ga2O3 and related materials
- Nanomaterials and Printing Technologies
- Silicon Nanostructures and Photoluminescence
- Nanowire Synthesis and Applications
- Electronic and Structural Properties of Oxides
- Ferroelectric and Negative Capacitance Devices
- Conducting polymers and applications
- Dyeing and Modifying Textile Fibers
- Advanced Condensed Matter Physics
- MXene and MAX Phase Materials
Universidade Nova de Lisboa
2013-2022
University of Lisbon
2004-2022
Faculdade de Tecnologia e Ciências
2014-2021
Uninova
2014-2020
Departamento de Ciência e Tecnologia
2016-2017
Nova Institut
2014-2015
International Iberian Nanotechnology Laboratory
2011
Instituto Superior Técnico
2004-2005
Oxide electronic materials provide a plethora of possible applications and offer ample opportunity for scientists to probe into some the exciting intriguing phenomena exhibited by oxide systems interfaces. In addition already diverse spectrum properties, nanoscale form oxides provides new dimension hitherto unknown due increased surface-to-volume ratio.
Human health, environmental protection and safety are just a few examples of humankind's current main concerns, that drive the scientific community to develop sensors able monitor precisely provide alerts possible harm in real time. Over years, semiconductor metal oxide-based materials have been extensively employed as several applications. They particular interest at nanometer scale, since it is widely known smaller crystallite size enhances sensor's performance. Moreover, these highly...
Smart textiles consist of discrete devices fabricated from-or incorporated onto-fibres. Despite the tremendous progress in smart for lighting/display applications, a large scale approach display system with integrated multifunctional traditional textile platforms has yet to be demonstrated. Here we report realisation fully operational 46-inch consisting RGB fibrous LEDs coupled fibre that are capable wireless power transmission, touch sensing, photodetection, environmental/biosignal...
Solution processing has been recently considered as an option when trying to reduce the costs associated with deposition under vacuum. In this context, most of research efforts have centered in development semiconductors processes nevertheless suitable dielectrics for oxide based transistors is relevant semiconductor layer itself. work we explore solution combustion synthesis and report on a completely new green route preparation amorphous aluminum thin films; introducing water solvent....
Antibacterial fabric using a simple, reproducible and low cost technique to synthesize high-quality ZnONPs was prepared characterized.
The current trend for smart, self-sustainable, and multifunctional technology demands the development of energy harvesters based on widely available environmentally friendly materials. In this context, ZnSnO
The interest in advanced photocatalytic technologies with metal oxide-based nanomaterials has been growing exponentially over the years due to their green and sustainable characteristics. Photocatalysis employed several applications ranging from degradation of pollutants water splitting, CO2 N2 reductions, microorganism inactivation. However, maintain its eco-friendly aspect, new solutions must be identified ensure sustainability. One alternative is creating an enhanced paper by introducing...
Abstract Lately, printed oxide electronics have advanced in the performance and low‐temperature solution processability that are required for dawn of low‐cost flexible applications. However, some remaining limitations need to be surpassed without compromising device electronic operational stability. The printing a highly stable ultra‐thin high‐κ aluminum‐oxide dielectric with high‐throughput (50 m min −1 ) flexographic is accomplished while simultaneously demonstrating processing (≤200 °C)....
Solution processing of amorphous metal oxides has lately been used as an option to implement in flexible electronics, allowing a reduction the associated costs and high performance. However, research focused more on semiconductor layer rather than insulator layer, which is related stability performance devices. This work aims evaluate aluminum oxide thin films produced by combustion synthesis influence far-ultraviolet (FUV) irradiation properties thin-film transistors (TFTs) using different...
Solution-processed metal oxides have been investigated as an alternative to vacuum-based implement low-cost, high-performance electronic devices on flexible transparent substrates. However, their electrical properties need be enhanced apply at industrial scale. Amorphous indium-gallium-zinc oxide (a-IGZO) is the most-used semiconductor active channel layer in thin-film transistors (TFTs), due its superior properties. The present work evaluates influence of composition, thickness and ageing...
In the past decade, solution-based dielectric oxides have been widely studied in electronic applications enabling use of low-cost processing technologies and device improvement. The most promising are high-κ dielectrics, like aluminum (AlOx) hafnium oxide (HfOx), that allow an easier trap filling semiconductor low operation voltage. However, case HfOx, a high temperature usually is needed to induce uniform condensed film, which limits its flexible electronics. This paper describes how obtain...
Water pollutants are currently a major concern, demanding for simple processes water treatment, photocatalysis being one of the most efficient and promising processes. Metal oxide materials widely studied this application, due to their wide band gaps, with nanostructures particularly interesting because high surface-to-volume ratio. In context, zinc-tin (ZTO) quite appealing owing multiplicity structures morphologies possible achieve low-cost solution-based synthesis lack critical elements...
Printed combustion-based aluminium oxide (AlO<sub>x</sub>) resistive switching devices produced at low temperature show a high reproducibility (95%) and multilevel cell operation with potential for hardware security applications.
Solution based deposition has been recently considered as a viable option for low-cost flexible electronics. In this context research efforts have increasingly centred on the development of suitable solution-processed materials oxide transistors. Nevertheless, majority synthetic routes reported require use toxic organic solvents. work we report new environmental friendly solution combustion synthesis route, using ethanol solvent, preparation indium/gallium free amorphous zinc-tin (ZTO) thin...
The present study is focused on the synthesis of zirconium dioxide (ZrO2) nanomaterials using hydrothermal method assisted by microwave irradiation and solution combustion synthesis. Both techniques resulted in ZrO2 powders with a mixture tetragonal monoclinic phases. For synthesis, further calcination treatment at 800 °C for 15 min was carried out to produce nanopowders dominant phase, as attested X-ray diffraction (XRD) Raman spectroscopy. thermal behavior nanopowder investigated situ XRD...
Solution-processed field-effect transistors are strategic building blocks when considering low-cost sustainable flexible electronics. Nevertheless, some challenges (e.g., processing temperature, reliability, reproducibility in large areas, and cost effectiveness) requirements that must be surpassed order to achieve high-performance transistors. The present work reports electrolyte-gated using as channel layer gallium–indium-zinc-oxide nanoparticles produced by solvothermal synthesis combined...
Chemical solution deposition is a low cost, scalable and high performance technique to obtain metal oxide thin films. Recently, combustion synthesis has been introduced as chemical route reduce the processing temperature. This method takes advantage of chemistry precursors source energy for localized heating. According some organic solvents can have dual role in reaction, acting both solvent fuel. In this work, we studied 2-methoxyethanol based ZTO films its influence on TFTs. The thermal...
Semiconductor nanowires are mostly processed by complex, expensive, and high temperature methods. In this work, with the intent of developing zinc tin oxide (ZTO NWs) low-cost low-complexity processes, we show a detailed study on influence chemical parameters in hydrothermal synthesis ZTO nanostructures at temperatures only 200 °C. Two different precursors, ratio between concentration surfactant agent mineralizer were studied. The type crystallinity found to be highly dependent used...
A typical schematic for both spray pyrolysis set-up and ZrO<sub>x</sub>-based TFT device, the corresponding electrical performance.
ZnSnO3 semiconductor nanostructures have several applications as photocatalysis, gas sensors, and energy harvesting. However, due to its multicomponent nature, the synthesis is far more complex than binary counter parts. The complexity increases even when aiming for low-cost low-temperature processes in hydrothermal methods. Knowing detail influence of all parameters involved these imperative, order properly control achieve desired final product. Thus, this paper presents a study physical...
Excimer laser annealing (ELA) combined with combustion synthesis leads to high quality metal oxide TFTs in a short processing time.