A5026510699- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Luminescence Properties of Advanced Materials
- Ga2O3 and related materials
- Misinformation and Its Impacts
- Media Influence and Politics
- Polymer Nanocomposite Synthesis and Irradiation
- Silicon Nanostructures and Photoluminescence
- Advanced Photocatalysis Techniques
- Electrochemical sensors and biosensors
- Social Media and Politics
- Mercury impact and mitigation studies
- Solid State Laser Technologies
- Laser Material Processing Techniques
- Biosensors and Analytical Detection
- Crystal Structures and Properties
- Nuclear materials and radiation effects
- Advanced biosensing and bioanalysis techniques
- Laser-Ablation Synthesis of Nanoparticles
- Electrodeposition and Electroless Coatings
- Analytical Chemistry and Sensors
- Semiconductor materials and interfaces
- Chalcogenide Semiconductor Thin Films
University of Aveiro
2019-2024
Complejo Hospitalario Universitario de Santiago
2019
A scalable laser scribing approach to produce zinc oxide (ZnO) decorated laser-induced graphene (LIG) in a unique laser-processing step was developed by irradiating polyimide sheet covered with Zn/ZnO precursor CO2 (10.6 μm) under ambient conditions. The parameters revealed strong impact on the surface morphology of formed LIG, ZnO microparticles' formation and distribution, as well physical properties fashioned composites. microparticles were seen be randomly distributed along LIG surface,...
Zinc oxide (ZnO)/laser-induced graphene (LIG) composites were prepared by mixing ZnO, grown laser-assisted flow deposition, with LIG produced laser irradiation of a polyimide, both in ambient conditions. Different ZnO:LIG ratios used to infer the effect this combination on overall composite behavior. The optical properties, assessed photoluminescence (PL), showed an intensity increase excitonic-related recombination increasing amounts, along reduction visible emission band. Charge-transfer...
In situ ion-beam-induced luminescence measurements reveal a strong enhancement of the Cr3+ emission yield in electrically conductive chromium doped β-Ga2O3 single crystals upon proton irradiation. The observed effect can be explained based on Fermi-level pinning caused by radiation defects. This Fermi level activates deep carrier traps that act as sensitizers emission. agreement with this model, semi-insulating samples, where lies bandgap, is present already as-grown and no its intensity...
Antibiotic pollution of freshwaters and even food products has become an important concern worldwide. Hence, it is utmost importance to develop cost-effective reliable devices that can provide information on the presence such contaminants general population. In present work, zinc oxide (ZnO) nanotetrapods (NTP) produced via a high yield laser processing approach were used as transducers in luminescent-based immunosensor detect tetracycline (TC). These tetrapodal structures needle-shaped...
Cr-doped Al2O3 spheres with strong red emission were produced using a simple laser processing approach 50 W continuous CO2 laser. Structural characterization revealed that the monophasic, comprising α-Al2O3 phase. Photoluminescence (PL) studies indicated observed originates from multiple Cr3+ optical centers being dominated by 2E → 4A2 transition (R-lines), further contribution parity and spin forbidden 2T1 (R′-lines). The identification of additional radiative recombination chromium ion...
Zn1+xGa2−2xGexO4 (ZGGO:Cr)-persistent phosphor, with a molar fraction, x, of x = 0.1, doped 0.5% chromium, was synthesised via solid-state reaction at 1350 °C for 36 h. X-ray diffraction measurements and Raman spectroscopy evidence single crystalline phase corresponding to the cubic spinel structure. Room temperature (RT) photoluminescence (PL) afterglow decay profiles were investigated using above below bandgap excitation. In both cases, persistent PL observed almost 8 h, mainly originating...
Abstract A high-temperature furnace was constructed to perform in situ grazing-incidence small-angle x-ray scattering (GISAXS) experiments at high temperatures for isothermal studies. The consists of two interconnected chambers: (i) a main chamber housing the heating elements, where sample is inserted during GISAXS measurements, and (ii) pre-chamber maintained near room temperature until reaches pre-selected value. two-chamber design allows rapid increase avoids overheating, conditions...