Materials Literature
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We provide a perspective on the emergence of “topological spintronics,” which exploits the helical spin texture of 2D surface states in 3D topological insulators. Spin- and angle-resolved photoemission spectroscopy shows how this spin texture can be engineered using quantum tunneling between surfaces [1], while spin t…
The interconnect of flexible electronics requires to be electronically conductive as well as mechanically flexible, adhesive to plastic substrate and productively efficient while conventional technologies to form the interconnect are difficult to attain all of these requirements. The conductive polymer/metal composite…
Visualization of growth-sector boundary and point defects in non-linear optic crystal (KDP) was performed by phase-contrast method with adaptive photothermal Zernike filter.
Vibronic states of organic semiconductors based on zirconium monophthalocyanine molecules have been studied. Vibrational and rotational transitions in the organic semiconductor containing zirconium atoms are precisely described based on data of infrared absorption and Raman spectroscopy.
The present paper deals with the dynamic behavior of nano-column subjected to follower force using the nonlocal elasticity theory. The nonlocal elasticity theory is used to analyze the mechanical behavior of nanoscale materials. The used method of solution is the Differential Quadrature Method (DQM). It is shown that…
Carbon nanofibers contained nano cellulose were prepared and the resulting carbon nanofiber composites were characterized by electron microscopy, Brunauer-Emmett-Teller (BET) method and image analysis. The samples are also evaluated as electrodes of electric double layer capacitor. The diameters of nano fibers are aro…
Summary form only given. The channel temperature (Tch) and thermal resistance (Rth) of Ga2O3metal-oxide-semiconductor field effect transistors were evaluated for the first time through electrical measurements complemented by device simulations that incorporated experimental Ga2O3thermal parameters. The analysis techni…
Summary form only given. In this study, a nitride light-emitting diode (LED) with an electroplated Cu substrate was detached from a GaN/sapphire (Eco-GaN) template by chemical lift-off (CLO) using an AlN/strip-patterned-SiO2intermediate sacrificial layer. To etch the patterned SiO2and AlN layers, the HF and 80°C-KOH s…
We investigate the impact of various phonon scattering mechanisms on the in-plane thermal conductivity of suspended silicon thin films with two-dimensional periodic arrays of holes, i.e. phononic crystal (PnC) nanostructures. We find that thermal conductivity is mostly determined by the surface-to-volume ratio, but as…
A fitting model is developed for an I-V characteristic of a graphene field-effect transistor (G-FET) with asymmetry about the Dirac voltage, originated from the thermionic emission and interband tunneling at junctions between the gated and access regions. We apply the model to a top-gated G-FET with graphene grown on…
The average transmittance (Tavg%) and optical energy gap (Eg) increased rapidly with increasing O2flow. The resistivity significantly increased with increasing O2flow for annealing temperature at 200°C, however the resistivity did not change with the O2 flow for the annealing temperature at 400°C. Hall mobility reache…
Light emitting III-V materials have shown a severe reduction in efficiency for wavelengths in the range 550-590 nm in both InGaN and AlInGaP compounds. Quantum dot (QD) based active layer could afford the promise to solve some of these limitations, providing an interesting route towards high performance optoelectronic…
To understand the importance of capturing penetrating forms of iodine as well as the other volatile radionuclides, a calculation tool was developed in the form of an Excel® spreadsheet to estimate the overall plant decontamination factor (DF). The tool requires the user to estimate splits of the volatile radionuclides…
Ferroelectric Charge Ordering in BaTi0.9Zr0.1O3 Lead-Free Ceramics through Powder X-Ray Diffraction J. Mangaiyarkkarasi, R. Saravanan In this work, we report the structural, ferroelectric charge ordering and optical properties of lead-free BaTi0.9Zr0.1O3 ceramics synthesized by the high temperature solid state reactio…
The quality and use of inking and dampening rollers on the printing press is one of the important factors that affect the printing quality and production performance. The aim of this study is to determine the roughness, diameter and hardness changes on the surface of offset printing rollers while operating time and in…
Model equations of a combined system with a high temperature polymer electrolyte fuel cell (HT-PEFC) system based on phosphoric acid (PA)-doped polybenzimidazole(PBI) membranes and a heat recovery power system were derived. In this study, an organic Rankine cycle system (ORCS) was proposed as a bottoming cycle system…
Treballs Finals de Grau de Quimica, Facultat de Quimica, Universitat de Barcelona, Any: 2016, Tutor: Joaquim Crusats Aliguer
Resumen Las aleaciones de Fe-Cr-Mo se utilizan en recubrimientos para proteger componentes que están sometidos a condiciones de desgaste y corrosión. La alta velocidad de deposición del metalizado térmico (HVOF) (High Velocity Oxi-Fuel) aplicado en aleaciones de acero grado herramienta para trabajo en frío con la apli…
We have observed anomalous temperature dependence of magnetization of ZnSnAs2:Mn epitaxial thin films grown on InP(001) substrates compared with the values estimated by the mean-field theory using S = 5/2, as a function of temperature: The ZnSnAs2:Mn epitaxial thin films exhibits slightly increasing magnetization with…
Hot shearing is a method of producing various high-quality planar machine parts by using reduced punch load. In order to predict the results of this process, the deformation behavior of work material at elevated temperatures need to be studied. In this research, a tensile test was carried out for 5052 aluminum alloy a…