A5053988236- Thermography and Photoacoustic Techniques
- Metal and Thin Film Mechanics
- Electronic Packaging and Soldering Technologies
- Thermal properties of materials
- Semiconductor materials and devices
- Laser Material Processing Techniques
- Electrospun Nanofibers in Biomedical Applications
- Smart Materials for Construction
- Intermetallics and Advanced Alloy Properties
- Advanced Sensor and Energy Harvesting Materials
- ZnO doping and properties
- Copper Interconnects and Reliability
- Advanced Sensor Technologies Research
- GaN-based semiconductor devices and materials
- Adhesion, Friction, and Surface Interactions
- Thin-Film Transistor Technologies
- MXene and MAX Phase Materials
- Transition Metal Oxide Nanomaterials
- Gold and Silver Nanoparticles Synthesis and Applications
- Photoacoustic and Ultrasonic Imaging
- Optical and Acousto-Optic Technologies
- Radiative Heat Transfer Studies
- Calibration and Measurement Techniques
- Tissue Engineering and Regenerative Medicine
- Nuclear Physics and Applications
University of Minho
2012-2024
Ruhr University Bochum
1999
Abstract Optically active Au : TiO 2 nanocomposite thin films with an amount of gold about 15 at% were prepared by dc reactive magnetron sputtering. After the deposition, samples annealed in vacuum at different constant temperatures between 200 and 800 °C. Depending on annealing temperature, considerable changes have been found films' crystalline structure for number, shape dimensions clusters. Modulated IR Radiometry (MIRR), a non-contact, non-destructive modulation-frequency-dependent...
Titanium thin films of different thicknesses were prepared by direct current magnetron sputtering to study modulated infrared (IR) radiometry as a tool for analyzing film thickness. Thickness was varied regularly increasing the deposition time, keeping all other parameters constant. The influence thickness on morphological, structural, and electrical properties titanium coatings also investigated. experimental results revealed systematic grain growth with thickness, along enhanced...
The thermal contact resistance of polymer-based carbon fiber composites was calculated from experimental conductivity values. Thermal the increases as content increases. In order to explain variation with size and volume fraction conductive inclusions in composite, an effective medium model, which includes effect interfacial resistance, applied. Two different geometries for distribution matrix were considered. obtained models is good agreement theoretical predictions. Once tested validated,...
This paper presents the development of metallic thermoresistive thin film, providing an innovative solution to dynamically control temperature during injection molding process polymeric parts. The general idea was tailor signal response nitrogen- and oxygen-doped titanium-copper film (TiCu(N,O))-based transducers, in order optimize their use sensor devices. results reveal that nitrogen or oxygen doping level has evident effect on TiCu(N,O) films. coefficient resistance values reached 2.29 ×...
Abstract Coatings prepared by reactive magnetron sputtering of approximately equal thermal transport properties but differing coating thicknesses are analyzed means non‐contact non‐destructive modulated IR radiometry . For the quantitative interpretation, measured wave signals calibrated, using for a homogenous opaque solid smooth surface. The relative minima inverse calibrated phase lag interpreted with respect to effective and thickness an solution two‐layer problem. Based on measurements...
Multifunctional coatings consisting of transition metal oxycarbides and oxynitrides deposited by physical vapour deposition techniques on tool steel are analysed in this work means modulated IR radiometry (MIRR), a non-contact non-destructive thermal wave measurement technique, with respect to the transport properties relevant for time-dependent surface heating processes coating–substrate systems. In order interpret measured data quantitatively, an inverse solution two-layer problem is...
Abstract This work is devoted to the investigation of relevant thermal transport parameters multifunctional ZrO x N y thin films, prepared in strict controlled conditions. Composition and structural characterizations revealed existence two different types with a change from fcc ZrN Zr 3 4 ‐type. Modulated IR radiometry was used screen out these internal changes, also prove its importance application viability within complicate systems such as films. The diffusion time coatings ratio...
(TiSi)N and TiCO thin films deposited by DC reactive magnetron sputtering on steel are analyzed here with regard to their thermal properties means of modulated IR radiometry, a measurement method especially suited analyze coatings. By varying the modulation frequency intensity-modulated laser beam heating, this allows control waves' penetration depth, thus controlling depth profile beneath sample surface. At high frequencies, corresponding small depths, surface roughness effects sensed, at...
In this work we present the synthesis and characterization of polyethylene oxide (PEO) based triglycine sulfate (NH2(CH2OOH)3H2S04, TGS) nanofibres obtained by electrospinning. The fibres, with typical diameters about 190–750 nm above several hundred micrometres in length, nanocrystals TGS embedded a polymer matrix. were characterized FT-IR spectroscopy domain structure was examined piezoforce microscopy. Dielectric permittivity measurements on TGS–PEO exhibit characteristic...