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These deluxe stationery kits, themed to the Great Houses of Westeros, provide all the items you need to communicate Ciltli İngilizce Sayfa 15,19x23,01x3,2 cm. Written by one of the field's pioneers, this highly practical, focused resource integrates the existing body of traditional knowledge with the most recent breakthroughs to offer the reader a solid foundation as well as working technical skills. To get a deeper insight in the subject, we characterize the plasma produced by laser ablation of steel and glass.
Therefore, fast imaging is applied to observe the expansion dynamics of the ablation plume into the surrounding background gas. Time-resolved optical emission spectroscopy is used to measure temperature and electron density as functions of time. In addition, by comparing the measured spectra to the spectral radiance computed for a plasma in local thermodynamic equilibrium, we deduce the elemental composition and the total amount of material transformed into the plasma state.
This amount is compared to the ablated mass that is deduced from volume measurements of the laser-produced craters via optical microscopy. The results are summarized by giving an energy balance for ablation under argon atmosphere and ambient air. A tentative explanation of the low accuracy observed minor element fraction measurements via calibration-free LIBS is proposed.
We report here on the synthesis of zinc oxide thin films and nanostructures using the pulsed laser deposition technique PLD. PLD enables a controlled adjustment of deposition parameters, so ZnO thin films were deposited on c-plane sapphire at different oxygen pressures, substrate temperature, laser energy and repetition rate to study the effect on the crystalline properties and morphology of the resulting films.
We demonstrate the growth of high quality crystalline ZnO thin films with preferential orientation along the c-axis. The average crystallite height ranges between 15 and 50 nm with aligned grains. By varying the deposition parameters, we observe different surface morphologies of the ZnO thin films, from smooth surfaces to clusters of grains and lateral growth of nanorods, corresponding to the different growth modes involved in PLD.
The residual strain in the films can be tuned from compressive to tensile, and does not depend on the thickness. Finally, to study the optical properties of the resulting thin films, UV-VIS transmission measurements were carried out from which the band gap was calculated using a corrected Kramers-Kronig technique. Resume : Sensors and biosensors play a leading role in devices and systems destined for human health and safety.
However, most of the existing sensor based systems require complicated electronic structures and high manufacturing costs. Therefore, cheap devices on light, flexible substrates are required. This work deals with the design, fabrication, and characterization of a flexible, wearable, and low cost sensor suited for on-body physiological monitoring based on nanocomposite materials polymers and graphene and fabricated by laser-induced forward transfer LIFT. Conventional LIFT consists of the irradiation, using a pulsed laser, of a thin layer of an absorbing material the donor that has been deposited onto a transparent substrate.
The layer is irradiated through the substrate and the light-matter interaction which takes place at the interface generates a strong increase of the local pressure. As a result, a small piece of the thin film located above the irradiated area is ejected as a pixel from the substrate surface and deposited onto a target substrate the receiver arranged in close proximity to the donor substrate. The size of the ejected material is controlled by the size of the incident laser spot.
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In this work, we printed different polymer:graphene nanocomposites onto flexible substrates coated with an insulating layer, for ex. Parylene C, which prevents electrical contact with the body fluids. The biosensors fabricated by LIFT are used for the detection of heavy metals in human body fluids. Promising results i. Resume : Magnetite Fe3O4 and wustite FeO are well-known oxides for their tremendous magnetic properties. However, being able to grow stable FexOy thin films with controlled iron oxidation states could be of interest for further applications.
This result is interpreted as a possible phase separation from the FeO metastable phase. The precise growth conditions leading to the formation of FeO-based film are also discussed. The method involves two steps. In the first one, nanostructures are deposited by standard pulsed laser deposition technique on a quartz substrate.
In the second step, the as-prepared samples are irradiated by nanosecond Nd:YAG laser in distilled water. The possibility of transferring of the initial nanostructure into the liquid is demonstrated. The influence of different laser processing parameters on the characteristics of the colloidal solutions is studied.
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Transmission electron microscopy and selected area electron diffraction are employed for revealing the morphology and identification of the phase composition of the created nanostructures. The optical properties of the produced colloids are evaluated by optical transmittance measurements in the UV—VIS spectral range. The presented method could be an efficient alternative to the chemical methods for fabrication of complex metal-oxide nanostructures composed colloids with possible application in biotechnology, photonics, and catalysis.
Resume : This study presents a laser-assisted method for fabrication of oriented nanowires composed by nanoparticles. The technology is based on an implementation of the pulsed laser deposition PLD process in an open-air atmosphere in the presence of a magnetic field. Ablation of an iron oxide target was performed by nanosecond laser pulses delivered from Nd:YAG laser system oscillating at nm.
Due to the high density of the ambient, nanoparticles and nanoparticle aggregates were formed by condensation in the plasma plume. The application of an external magnetic field on the ablated material resulted in an arrangement of the nanoparticles on the substrate forming long few microns nanowires with an orientation parallel to the magnetic lines of force. The dependence of the morphology of the produced structures on the process parameters as laser wavelength, laser fluence, target-to-substrate distance and orientation of the magnetic field was investigated. The presented structures could be used in the design of novel nanoelectronics, spintronics, and magneto-optics devices.
Resume : The aim of the work reported here is the growth of titanium oxide films and nanostructures starting from either metallic Ti or TiO2 targets using the pulsed laser deposition PLD technique. The structure point of the obtained films was investigated by grazing and symmetrical incidence X-ray diffraction. The surface morphology was studied by scanning electron microscopy and atomic force microscopy.
Also, the chemical composition of the deposited films was investigated using X-ray energy dispersive and X-ray photoelectron spectroscopies.
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The electrical characteristics of the deposited films were measured by a four point probe technique and optical properties were obtained from transmission measurements in the nm. Wettability studies completed the surface characterization of these films. The results showed that the nature and pressure of the gaseous atmosphere during deposition controlled the films structure, stoichiometry and properties. Films contained mixtures in various ratios of metallic Ti and different oxides, starting from Ti3O up to the stable rutile TiO2. The surface morphology, apart from the usual droplets found in PLD grown films, was generally smooth, although for the 0.
Most interestingly, the wettability of these films could be controlled from hydrophobic to hydrophilic, which could have interesting applications for medical implants made from Ti or Ti alloys. Resume : Metal nanoparticles have a wide variety of application areas including electronic devices, displays, solar cells, and biosensors. In particular, gold nanoparticles have attracted significant attention due to their superior biocompatibility and unique optical properties. The distinct surface plasmon resonance SPR and surface-enhanced Raman scattering SERS effects of Au nanoparticles can be effectively utilized in biomedical sensing and imaging.
To achieve distinctive optical signals, these particles should be uniform in shape and size. Various chemical methods have been developed to control the size and shape of metal nanoparticles, however, they are often energy-intensive, employ toxic chemicals, and require high temperatures. We show that Au nanopowders with arbitrary shapes can be converted into nanoparticles with a narrow size distribution by using a nanosecond Nd:YAG laser. Commercial Au powders were first dissolved in deionized water and irradiated with laser pulses at nm. This converted the powder clusters into spherical particles with sizes ranging from nm to a few micrometer.
Subsequent irradiation of these Au spheres with nm pulses produced a larger quantity of nanoparticles with fairly uniform sizes. The overall conversion process could be well explained by the photothermal melting-evaporation mechanism. The fabricated Au particles exhibited a mean size of 15 nm, with a standard deviation of 5. The Au colloidal solution was highly stable against agglomeration, and the particles remained well-dispersed in water for 1 month. This behavior is attributed to surface charges introduced during the laser process. Resume : Cobalt ferrite has attracted interest in various fields such as high-temperature superconductivity, spintronics, microelectronics and magnetic applications.
Our work is focused on understanding the growth of cobalt ferrite thin films on Si by pulsed laser deposition PLD. The study is aimed at investigating the influence that deposition parameters such as substrate temperature, target-substrate distance or oxygen partial pressure have on the physicochemical properties of the obtained films and, in particular, in cation oxidation states, cation distribution and crystal quality. The results indicate that deposition using laser irradiation wavelengths in the infrared nm, repetition rate of 10 Hz, 6 ns pulses , target-substrate distances in the range cm, partial oxygen pressure of mbar and a substrate temperature of oC produce the best thin films, with properties similar to those of the target.
Resume : In this work, we present the preparation of metal-oxide nanostructures by pulsed laser deposition PLD in air at atmospheric pressure in open air. The technology applied leads to the formation of nanostructures composed by nanoparticles or nanoaggregates. These nanostructures possess a large surface-to-volume ratio, which makes them suitable for gas-sensor application.
The technology presented for fabrication of sensor elements offers an easy way of adding other elements for doping purposes. The enhanced sensitivity and selectivity of the samples was demonstrated by fabrication of nanocomposite samples consisting of metal-oxide and noble-metal Au or Pd nanoparticles.
Resume : Improving the knowledge on tritium effects in different components in fusion facilities is an important issue. Commonly deuterium is used to replace tritium in simulation experiments. This work aims to study the deuterium doping effect on tungsten and aluminum properties. The influence of the radiofrequency discharge on the amount of deuterium present in the layers and on the doping effects was evidenced by X-ray diffraction, atomic force microscopy, secondary ion mass spectrometry, spectroellipsometry.
Resume : Transition metal borides have received a large scientific and technological interest in the last years, due to their peculiar chemical-physics and mechanical properties. Among these compounds chromium borides are promising candidates for several structural applications, in particular as protective coatings for materials exposed to corrosive and abrasive environments. In this paper the pulsed laser deposition of chromium diboride thin films has been carried out in vacuum by using a frequency doubled Nd:glass laser with a pulse duration of fs.
The films have been deposited at different substrate temperatures and characterized by x-ray diffraction, x-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. This hypothesis has been confirmed by the study of the plasma produced by the ablation process. Finally, the films hardness has been studied by Vickers indentation technique. Resume : We will present laser treatments of specific materials used for additive manufacturing and 3D Printer with a high energy laser emitting at nm. The laser was a Quantel Q-Smart with a pulse size of 5 ns and 10 Hz frequency, containing a frequency doubler.
We focalized the laser source with a simple spherical lens to see how the laser can bore, or excavate material without problems and destruction. The two materials have very unusual optical and physical properties: the verowhite is very porous and containing many particles, whereas the visijet is clear but it is a diffuse material.
We made also measurements with a commercial optical Interferometer Newview from Zygo to measure the hole depth and see the exacte profile of the crater. We made also profilometry of other Full Field house made optical coherence tomography system. This measurements allow us to estimate the ablation rate versus the shot number. Resume : Experimental investigations were performed on ns laser ablation plasma on metallic targets Al, Ag-Cu alloy. The dynamics of the plasma plumes were investigated in situ by ICCD fast camera imaging and space-and time-resolved optical emission spectroscopy OES.
The fast camera imaging revealed the splitting of the plume into two plasma structures expanding with different velocities, while the OES measurements revealed strong fluctuation in the spatial distribution of the excitation temperature determined by Boltzmann plot method. The temperature fluctuations are related to the plasma oscillatory behavior, recently showcased in the laser ablation community.
The angular distribution of the plume front velocity was determined and revealed a segregation of the alloy generated plasma based on its components. The results are discusses in conjecture with the bonding energy of the metallic ions in the crystalline lattice and the scattering effects during plume expansion. The results indicated the non-congruent transfer from the alloy target, as the final thin film was found to be depleted of Cu.
This is in a good agreement with the plasma plume behavior, too. A scattering theoretical model was developed in the framework of a fractal hydrodynamic approach. The model aims to envelop the dynamics of plasma particle in complex targets in relation with the mean free path and scattering probability for each species.
The results concerning the angular distribution of the ejected species during expansion, are in good agreement with the experimental data. Resume : The current work concerns investigation on noble metal doped glass materials radiated by femtosecond laser pulses. The motivation of the research is based on the specific properties of noble metal nanoparticles and their applications.
The main part of the applications is related to their unique optical properties. In this study are observed filament formations in Au ion doped glass materials during the irradiation by femtosecond laser pulses. The second harmonic generations in the media are observed as well. This proves the formation of crystal structures inside the media after femtosecond laser radiation. Nonlinear effects of the glass samples are investigated in terms of the laser beam parameters.
The wavelengths used in the experiments are between to nm, generated by optical parametric amplifier system TOPAS. The regenerative Ti:Sapphire amplified laser system emits at nm central wavelength with a pulse duration of 35 fs and 1 kHz repetition rate. Resume : We report a study of the relation between mechanical, optical and structural properties of Aluminum nitride AlN thin films, synthesized on Si substrates by pulsed laser ablation PLD at different deposition conditions.
The AlN films are nanostructured and thus alteration of mechanical and optical properties with films structure are expected. The mechanical properties of the films are investigated by Berkovich nanoindentation induced deformation in the loading interval mN. Those values are related to the AlN film structure that consists of nanocrystallite grains the development of which strongly depends on deposition parameters. The optical constants values, ellipsometrically obtained, higher than that typical for amorphous AlN infer the existence of crystallites in the amorphous film matrix.
PLD films gather a combination of mechanical and electrical properties for a wide range of applications. The electrical parameters are measured in air. The structure is influenced by controlling the oxygen pressure, the target- substrate distance and the laser fluence. The effect of microstructure of thin alfa- Al2O3 layer on 8 YSZ is studied to improve the mechanical stability limits of thermal barrier to avoid delamination by controlling the oxygen pressure, the target — substrate distance and laser fluence; columnar 8YSZ thin film provides a technique for compensation of thermally expansion during heating.
Resume : The bismuth based materials seem to be an attractive candidate for lead free materials. In this context, sodium bismuth titanate Na0. An enhanced stability of ferroelectric phase in thin films with respect to bulk has been observed for specific compositions within the MPB, explained by their peculiar microstructure. Resume : The interaction of light with nanocomposites reveals novel optical phenomena indicating unrivalled optical properties of these materials. Nanomaterials have drawn great attention because of their distinguishable optical properties such as appearance of prominent absorption bands via surface plasmon excitation.
The present study focuses on the synthesis of noble metal nanoparticles and how these particles can be incorporated and manipulated in thin film oxides. The structural and functional properties of the nanoparticles when embedded in a glass host matrix are covered by this research. The effect of laser and thermal annealing procedures on the behaviour of laser fabricated composite nanostructures in investigated. The coloration of samples is determined by the nano-sized metal particles in a dielectric matrix, due to a surface plasmon resonance effect of the conductive electrons and respective selective absorption.
The laser deposition and annealing are performed by a nanosecond Nd:YAG laser systems Lotis at third and fourth harmonics, with the pulse repetition rate of 10 Hz and the pulse duration of 12 ns. The experimental results indicate that the annealing induces a red-shift of the transmission dip. The tuning of optical properties of the samples was interpreted as a function of their morphology and structure, formed at certain parameters in the processing stages of deposition and annealing. Previous studies on laser ablation of CZTS have shown that the composition of the films can be controlled in-situ by tuning the laser fluence.
In this study, we compare films obtained with multicomponent oxide- and sulfide-based targets for CZTS solar cells using different PLD conditions. The advantage of using oxide films is that Sn losses during the annealing should be less as compared to the more volatile sulfide counterparts. Our data indicate that the oxygen content in the annealed CZTS films both from oxide and sulfide films is comparable.
Raman, photoluminescence and XRD analyses show that high quality crystalline films are formed from oxide precursors after the annealing. The films and solar cells produced from both oxide and sulfur precursors routes are compared in terms of structural, optical, electrical and morphological properties. Resume : Devices developed for aeronautic or space industry must be able to operate in harsh environments, where the mechanical stress and temperature gradients are high.
In order to protect those devices, various coating techniques and materials were developed. In our work, we report on multilayer structures obtained by pulsed laser deposition. A parametric study on the influence of substrate temperature, multilayer composition and the deposition gas pressure on the properties of the coating properties was carried out.
The optical properties and the thicknesses of layers were investigated by spectroscopic ellipsometry SE. The dependence of optical constant with temperature was determined by SE in the C range of temperature. Resume : The fast and cost-effective laser patterning of thin metal films with lateral sizes below the diffraction limit is still a challenge but self-organizing processes are therefore of special interest.
The lateral confinement of the metal film achieved by lithographic patterning allows the tuning of the pattern arrangement from randomly distributed, unequal sized patterns to quasi periodically arrangements and finally to determined structures due to the reduction of the lateral size of the initial metal structures below the liquid film instability limit.
The irradiation of these substrates with the metal squares leads to melting, mass transport due to the surface tension in the metal liquid phase and finally a nano pattern formation after resolidification of the molten metal from the squares. Furthermore, the process was simulated considering the heat equation and the Navier-Stokes equation for describing laser heating and melting and the mass transport in the liquid phase, respectively. Resume : Over the years, great strides have been made by the laser micromachining industry in quality, performance, and cost areas.
When used as a patterning tool, ultra-short pulse lasers have become a serious contender for the well-established clean-room based techniques. Both the quality of available structures and resolution have come close and can even surpass the capabilities of conventional lithography.
Therefore, exploitation of photon-assisted nanostructuring techniques, which often are single-step operations compatible with a full spectrum of materials, is relevant and well worth the effort. In this work we present our research based on femtosecond laser microstructurisation of metal surfaces, i. We used these techniques for several relevant applications: copper diffraction gratings for efficient light trapping in photodetectors, copper microstructures for seeded nanowire growth, arrays of diffraction gratings, i.
We cover such aspects of research as intended structure modelling, laser patterning, technological parameter optimization, characterization of achieved structures, etc. Our results showcase the capabilities of laser patterning technology as an emerging alternative for conventional lithography on a variety of materials and with a quality that is high enough for the patterned nanostructures to be used in practical applications. Resume : A few years ago, it has been demonstrated that three-Fe-sites lattice distortions called trimerons play a major role in the insulating phase of Fe3O4.
More recently time-resolved X-ray diffraction and optical reflectivity on bulk magnetite show how these trimerons are affected in the out-of-equilibrium Verwey transition induced by ultrashort lasers pulses. Here, we show the very first time-resolved magneto-optical study in thin Fe3O4 film as a function of temperature across the Verwey transition. Both ultrafast charges and spins dynamics allow us to identify the metal-insulator transition through their main temporal features.
In particular, we show that precession behavior is associated to a non-trivial modification of time-dependent effective field across the Verwey transition and is correlated to a transient mixed phase induced by ultrashort pulses. Resume : An electric field was applied during the process of pulsed laser ablation of Au and Ag targets immersed in double-distilled water using a Nd:YAG laser operating at different wavelengths and fluences, thus forming various colloids. The changes in the size and shape of the nanostructures were investigated as a function of the angle between the direction of the electric field applied and that of the laser beam propagation.
Further, the effect was explored of the electric field on the formation of the nanowire network. The colloids were visualized by transmission electron microscopy TEM , while the structure and phase composition were examined by high-resolution transmission electron microscopy HRTEM and selected area electron diffraction SAED. Resume : Plasma spray deposition is one of the most important technologies available for producing the high-performance surfaces required by modern industry.
In this process, powder of the coating material is fed into high-temperature plasma, which melts and accelerates the powder; the molten particles subsequently hit and solidify on the surface to be coated. Most of the applications require coatings with a high density, which are well bonded to the substrate.
To obtain good quality coating, the powder particle must be at least partially molten and hit the substrate with a high velocity. Since plasma spray equipment is expensive to operate, the cost of developing new coatings can be very high. A computer model capable of predicting the coating properties as a function of process parameters will greatly reduce the development time and cost. The 2D computational fluid dynamic technique have been applied to analyze the impacting process and the subsequent temperature fields of two molten ceramic particles in order to tackle the most complete heat transfer and solidification problem in order to characterize the overall coating.
Keys words: Plasma spray process; molten ceramic; coating properties; fluid dynamic technique. Resume : Advanced methods of optical spectroscopy have been developed and applied to study optical properties of various lanthanide-doped fluoride materials. The excitation beam is continuous or modulated into square-shaped pulses using an acousto-optical modulator. Emission is coupled to the double-parallel-detection-paths spectroscopic system covering broad spectral range from UV to NIR nm , which enable to observe both up-converted and down-converted emission and detect signal separately for each emission band .
The typical slow order of ms onset and decay kinetics of the main emission bands are described by a set of differential equations.
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The fitting of experimental datasets with this model gives deep insight into the energy transfer processes. The work is funded by the CSF, project s  J. Valenta and M. Greben, AIP Adv. Guille et al. The high photon flux combined with a new fast-acquisition-time 4 ms 2D-detector for high photon energies permits time-resolved in situ structural analysis of the selective laser melting process.
The high-energy synchrotron-radiation based X-rays result in small scattering angles. Resume : Direct laser writing is a very useful technique to process dielectrics for many applications, like micro-fluidics, photo-electronics or glass cutting for consumer electronics. Material processing requires accurate control on energy deposition profiles inside the transparent material, which strongly depends on irradiation conditions. Gauss-Bessel beams have been successfully used for ultra-high aspect ratio processing because of the enhanced stability of these beams in comparison with the unstable and complex filamentation regime of Gaussian beams.
International Journal for Multiscale Computational Engineering
In this work, we temporally split the input fs laser pulse in two equal pulses with a variable delay. We compare single and double pulse illumination as a function of delay on the drilling of high aspect ratio nanochannels in borosilicate glass. Our main result is that, with equal energy, splitting the pulse allows increasing the channel width and enables channel drilling for conditions when only index modification was created. The results strongly depend on the sub-nanosecond delay ie at delays below the standard burst mode of lasers. We report measurements of energy absorption and interpret our results in terms of confinement of the energy deposition.
Our results raise novel fundamental questions on laser-matter interaction and we anticipate a wide impact on technological applications to laser processing of transparent materials. Resume : Beam profile engineering, where a desired optical intensity distribution can be generated by an array of phase shifting or amplitude changing elements is a promising approach in laser material processing. For example, a spatial light modulator SLM is a dynamic diffractive optical element allowing for experimental implementations of controllable beam profile.
Both families exhibit non-diffracting properties similar to Bessel beams, where a relatively long focal depth retains unchanging intensity distribution, which makes them a promising approach in laser processing. Here, we introduce vector versions of those beams with controllable polarization and investigate numerically their spatial spectra. We use vector Mathieu and Weber beams as a basis to construct controllable on-axis phase and amplitude distributions with polarization control.
Further, we attempt to generate components of vector Mathieu beams experimentally using SLMs and report on our achievements in the control over the beam shape and dimensions along the propagation axis. Resume : The creation of a photonic jet at the tip of an optical fibre is an upcoming trend with various applications. The propagative, slightly diverging, light beam coming out of the fibre does not behave in accordance to the usual laws of wave optics. For example, the diffraction limit can be overcome, giving a FWHM smaller than a half wavelength. These unusual properties make the photonic jet an excellent tool for subwavelength micromachining.
The shaping of optical fibre tips is commonly done by thermoforming. Nevertheless, this method has some shortcomings for single mode fibers: the curvature of the tip is harder to control and the effect on the size and shape of the core and its concentration in dopant is unknown.
This study investigates an alternative fabrication process to obtain the desired tip shape: chemical etching. The simulation of the shape of the photonic jet out of single mode fibres was made by 2D FEM modelisation. The chemical etching process was studied both statically and dynamically, along with the effect of the vapours. By carefully controlling the experimental conditions, shapes in close accordance to the theoretical predictions were obtained. The tip shapes were observed by optical microscope and the size of the photonic nanojets measured through laser ablation on Si.
Eight time less energy has been required for etching using a single mode fiber tip shaped combining both chemical etching and thermoforming. Intro : Fibre tip shaping, HF, chemical etching, photonic nanojet. Resume : Dr. Such structures have the potential to act as the active components for the detection of biological and chemical analytes using various sensing modalities e.
The synthesis is reliant on the formation of Au seeds exhibiting planar defects — without such defects the growth mode is deactivated. Through the engineering of defects, which have been extensively studied using Titan TEM imaging and electron diffraction, such structures have now been produced in high yield. Here, we will describe the techniques used to generate periodic array of seeds, demonstrate their utility in forming substrate-based metallic nanoplates and provide an understanding of the opportunities and challenges that lie ahead.
Resume : Fluoride doped by rare-earth RE makes them excellent for optoelectronics and photonics applications. However, due to the low absorption cross-section of the RE ions, the efficiency of the converting layer needs to be increased. The fabrication of metallic NPs in UHV conditions embedded in fluoride matrix prevent the oxidisation, which could degrade of plasmonic properties of NPs.
The size of the NPs was controlled by the number of the laser pulses focused on the metallic target and varied between 5 and 20 nm. The analysis of the measured date revealed an absorption band in the range from nm up to nm corresponds to LSPR of incorporated metallic NPs depending on the metals and size, respectively. The calculated absorption cross absorption effective cross-section will be compared with experimental results.
The plasmonic behaviour of metal NPs will be compared with those presented for metal oxides nanocomposites. Resume : Considering the recent global interest in reducing energy consumption, SiC power electronics technology is now ready to enable the step to the next plateau for efficiency standards. In most case, SiC power modules are designed to work at operating temperatures around oC.
Therefore, comical available electronic components such as resistor, cannot use for the SiC modules because the electrode and resistor materials is deterioration in the temperature. In addition, we found that the trimming part is not good for the heat cycling properties oC. To overcome this problem, we developed new thin film resistor by using a photo reaction of hybrid solution PRHS process.
In this presentation, we will explain the PRHS process for the flexible oxide thin film resistor, capacitor and its electrical properties. First of all, we have developed the new hybrid solution for the thin film resistor. The hybrid solution was prepared by mixing the Ru organic solution and RuO2 particles without any glass and an organic vehicle.
The hybrid solution was spin-coated on the Al2O3 or polyimide substrate. The coated hybrid solution was heated or irradiated by UV lamp. Resistivity of the flexible RuO2 film was 4. The resistance change was 2. In addition, at the time of implementation, flexible resistor would be expected to relax the crack that comes from the difference in the thermal mechanical properties. Enabling high-temperature nanophotonics for energy applications.
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Physical Review Letters. Graphene-based photovoltaic cells for nearfield thermal energy conversion. Scientific Reports. Near-Field Radiative Cooling of Nanostructures. Nano Letters. Thermal radiation scanning tunnelling microscopy. Heat-assisted magnetic recording by a near-field transducer with eflcient optical energy transfer. Hyperbolic metamaterials. Definition and measurement of the local density of electromagnetic states close to an interface. Physical Review B,68 : A femtojoule calorimeter using micromechanical sensors.
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