A5100385319- Advancements in Battery Materials
- Advanced Thermoelectric Materials and Devices
- Gastrointestinal Bleeding Diagnosis and Treatment
- Advanced Battery Materials and Technologies
- Photonic and Optical Devices
- Thermal Radiation and Cooling Technologies
- Advanced Thermodynamics and Statistical Mechanics
- Advanced Battery Technologies Research
- CCD and CMOS Imaging Sensors
- Electrochemical Analysis and Applications
- Optical Coherence Tomography Applications
- Advanced Memory and Neural Computing
- Neuroscience and Neural Engineering
- Electronic and Structural Properties of Oxides
- Advanced Fiber Optic Sensors
- Semiconductor Lasers and Optical Devices
- Photoacoustic and Ultrasonic Imaging
- Energy Load and Power Forecasting
- Gastrointestinal disorders and treatments
- Optical Coatings and Gratings
- Atomic and Subatomic Physics Research
- Ultrasound Imaging and Elastography
- Transition Metal Oxide Nanomaterials
- Gas Sensing Nanomaterials and Sensors
- Gastric Cancer Management and Outcomes
Administração Regional de Saúde de Lisboa e Vale do Tejo
2025
University of Minho
2013-2024
IPO Porto
2019-2024
Lawrence Berkeley National Laboratory
2023
The University of Texas at Arlington
2023
Southern University and Agricultural and Mechanical College
2023
Clark Atlanta University
2023
Educational Department of Liaoning Province
2023
Polytechnic Institute of Cávado and Ave
2008
New Jersey Institute of Technology
2008
A flexible and ultralight planar thermoelectric generator based on 15 thermocouples composed of n-type bismuth telluride (Bi2Te3) p-type antimony (Sb2Te3) legs (each with 400 nm thick) connected in series, 25 μm thick Kapton substrate, was fabricated impressive power factor values 2.7 0.8 mW K–2 m–1 (at 298 K) for Bi2Te3 Sb2Te3 films, respectively. The p–n junction device can generate a maximum open-circuit voltage output 210 mV 0.7 μW (3.3 cm–2), respectively, temperature difference 35 K,...
Background: Acute kidney disease (AKD) is a recent definition reflecting ongoing physiopathological processes of an acute renal injury (AKI). Information on AKD in hematopoietic stem cell transplant (HSCT) scarce and there no available data long-term outcomes. We aimed to determine the cumulative incidence first 100 days after HSCT; identify risk factors for impact 3-year overall survival relapse-free HSCT. Methods: A retrospective cohort study was conducted, considering when AKI present...
This paper presents a thermoelectric (TE) generator and solid-state battery for powering microsystems. Prototypes of TE generators were fabricated characterized. The is planar microstructure based on thin films n-type bismuth telluride (Bi2Te3) p-type antimony (Sb2Te3), which deposited using co-evaporation. measurements selected samples Bi2Te3 Sb2Te3 indicated Seebeck coefficient in the range 90–250 µV K−1 an in-plane electrical resistivity 7–17 µΩ m. also showed figures-of-merit, ZT, at...
We report fabrication of reduced graphene oxide (rGO) films using chemical reduction by hydrazine hydrate and rGO paper-like samples low temperature treatment reduction. Structural analysis confirms the formation structure for both samples. Current-voltage (I–V) measurements film reveal semiconductor behavior with maximum current value ∼3 × 10−4A. The paper sample is found to be, at least, one order magnitude higher. Moreover, bipolar resistance switching, corresponding memristive type II,...
This communication shows the recipe for plasma-enhanced atomic layer deposition (PEALD) Al2O3 ultra-thin films with thicknesses below 40 nm. were deposited by PEALD to improve rubidium optically pumped magnetometers’ (OPMs) cell lifetime. requirement is due consumption of alkali metal (rubidium) inside vapor cells. Moreover, as a silicon wafer was used, an on-chip photodiode already integrated into fabrication OPM. The ALD parameters achieved GPC close 1.2 Å/cycle and window threshold at 250...
The influence of substrate type in boosting thermoelectric properties co-evaporated Bi2Te3 and Sb2Te3 films (with 400 nm-thick) is here reported. Optimized power factor values are 2.7 × 10−3 W K−2 m−1 1.4 for flexible films, respectively. This an important result as it at least 2 times higher than the found literature films. A infrared thermopile sensor was developed with high detectivity (2.50 107 cm √HzW−1).
This paper presents the design, fabrication and characterization of a linear variable optical filter (LVOF) that operates in infrared (IR) spectral range. An LVOF-based microspectrometer is tapered-cavity Fabry-Perot placed on top array detectors. The transforms spectrum into lateral intensity profile, which recorded by IR LVOF has been fabricated an IC-compatible process flow using resist reflow followed transfer etching this pattern resonator layer. technique provides possibility to...
Rechargeable solid-state lithium batteries were developed before [1] by physical vapour deposition (PVD). These are fabricated with lithium-cobalt oxide (LiCoO2), lithium-phosphorus oxynitride (LiPON) and (Li), respectively for cathode, electrolyte anode. The LiCoO2 LIPON deposited RF sputtering the metallic Li thermal evaporation. chosen material current collectors was titanium (deposited e-beam technique) to prevent chemical reactions in contact provide good electrical conductivity. In...
This paper presents the results of in vitro photodynamic therapy assays on RKO and HCT-15 cell lines. The envisaged implementation is autonomous medical microdevices, such as endoscopic capsules for clinical treatment several types gastrointestinal tract tumors. Because their very limited device volume, light fluence rate needed to destroy tumor cells should be minimized. Foscan or meta-tetra(hydroxyphenyl)chlorin (mTHPC) used a photosensitizer. experimental show that small amount mTHPC...
The integration of the narrow band imaging (NBI) technique in highly miniaturized minimally invasive medical devices is presented. NBI provides a more reliable sensing performance for <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in vivo</i> studies on tissues as compared to approaches based white light illumination. uses selective filtered with peak transmission at 415 (blue) and 540 nm (green). blue improves visualization superficial...
This paper reports on the development of a technology for wafer-level fabrication an optical Michelson interferometer, which is essential component in micro optoelectromechanical system (MOEMS) miniaturized coherence tomography (OCT) system.The MOEMS consists titanium dioxide/silicon dioxide dielectric beam splitter and chromium/gold micro-mirrors.These components are deposited 45° tilted surfaces to allow horizontal/vertical separation incident final microintegrated process saw dicing glass...
The several materials required for fabrication of thin-film solid-state rechargeable lithium batteries were deposited and characterized: A glassy lithium-phosphorus oxynitride electrolyte (LiPON) between a (Li) anode crystalline lithium-cobalt oxide cathode (LiCoO2), by RF-sputtering. Ti/Pt layers, e-beam used in contacts silicon nitride film (Si3N4), low temperature hot-wire CVD protects the battery. This technology allows with potential 4.5 V, typical capacities 50 μAcm−2 chargedischarge...
This paper presents the design, fabrication and characterization of two Fabry Perot type optical filters (415 nm 540 nm) for enabling Narrow Band Imaging (NBI) in medical devices (MD). The two-colour illumination should satisfy a highly specific which is composed thin-film filter stack titanium dioxide (TiO2) silicon (SiO2) thin-films commercially available light-emitting diodes (LEDs). short-wavelength design most critical simulations show maximum relative output 21% at 415 with...
Thin-film materials for solid-state rechargeable lithium batteries were fabricated by physical vapor deposition. The cathode is a cobalt oxide (LiCoO 2 ) film, separated from the anode (metallic lithium) an electrolyte of phosphorus oxynitride (LiPON). LiCoO was deposited RF sputtering, annealed after deposition and x-ray diffraction patterns showed higher crystallinity with hours annealing in vacuum temperature 650 ºC. LiPON reactive sputtering (nitrogen) metallic thermal evaporation. Ionic...
This paper presents a silicon neural probe with high-selectivity optical readout function and light emitting diodes for neurons photostimulation fluorophore excitation. A Fabry–Perot filter on the top of CMOS photodiodes array can read emitted fluorescence, which indicates physiological state. The design, fabrication, characterization are presented. SiO2 / TiO2 based thin films were deposited by RF sputtering. performance array, implemented in probe, was tested through in-vitro fluorescence...