Materials Literature
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LEETCHI is a source which will produce 140 keV, 5 A, 140 μs electron beams at a repetition rate of 50 Hz. The shot to shot and flat top current stability of this drive beam injector for CLIC has to be better than 0.1% and a geometrical emittance of 14 mm mrad is expected. The development of a high voltage modulator, t…
Superconductivity is a phenomenon in which a number of pure metals and alloys offer no resistance to the passage of electrical current below a certain critical temperature. Throughout the past research on the superconductivity, High Temperature Superconductor (HTSC) such as YBa2Cu3O7 was being focussed for their prope…
El uso de materiales sostenibles y la produccion de materiales que consuman una menor cantidad de energia en su fabricacion, ha impulsado la realizacion de investigaciones orientadas a desarrollar materiales aislantes termicos y acusticos con materiales naturales o reciclados. En la presente tesis, el tallo de arroz,…
Spark plasma sintering (SPS), also known as direct current sintering (DCS) is an advanced sintering technique that and uses a continuous pulsed direct current to rapidly process materials through Joule heating and offers significant advantages and versatility over conventional sintering methods. The technique features…
The complex architecture of cardiac extracellular matrix (ECM) provides a unique 3D environment fundamental for cardiac development, homeostasis, and functionality. The derangement of ECM integrity occurring during the onset and progression of cardiac diseases drives a modification in the nanotopography and mechano-ph…
The Lone Star porphyry copper deposit in the Safford District of southeastern Arizona was discovered in the late 1800's but never mined on a large scale. In addition to typical copper oxide species such as chrysocolla, the upper part of the deposit has zones of mineralization in which the chemical assays of core sampl…
Direct methanol fuel cells (DMFCs) are a kind of electrochemical energy-conversion device which converts the chemical energy of methanol directly into electric energy. Due to methanol’s high energy density, abundant source, low price, safety of storage and transportation, DMFCs have a great application potential in na…
Magnetic materials typically contain several uniformly magnetised regions, called domains, which are separated by domain walls. These domain walls can be moved by applying a driving force like an external magnetic field or a spin-polarised current. At high driving forces, this results in a smooth motion which is indep…
Diatoms are responsible for over 20% of the Earth's photosynthetic productivity, thus impact global fisheries, biogeochemical cycles and climate. However, marine primary productivity is limited by the micronutrient iron (Fe) in ~40% of the ocean. Diatoms inhabiting these regions have evolved unique physiological strat…
Os avanços na tecnologia dos biosensores tem vindo a revolucionar os cuidados de saúde, nomeadamente no diagnóstico de condições patológicas de forma rápida e eficaz, tornando o uso destes dispositivos uma realidade. O objetivo deste trabalho foi desenvolver tecidos condutores, sintéticos e naturais, compostos por pol…
Research was conducted into the development of a lab scale resin transfer molding (RTM) system for use in composite materials research and university education. A reactive injection mold (RIM) was converted into an RTM mold to produce flat 11”x 11” sandwich panels for destructive mechanical test specimens. The complet…
Nitrogen oxides (NOx) are formed during combustion in diesel engines and one current approach to reduce NOx to N2 is selective catalytic reduction with NH3 as reducing agent (NH3-SCR). To acquire both high activity and selectivity, the active site is often atomically dispersed metal atom, so-called single-site catalys…
Erbium doped titania and strontium titanate thin films were synthesized by the sol-gel method on the quartz glass, monocrystalline silicon and porous anodic alumina/silicon structures. Morphology of the surface and optical properties of the films were investigated. Luminescence spectra of the thin films show an intens…
Thanks to next-generation sequencing, the number of sequenced genomes grows rapidly, providing in particular ample examples for the sequence variability between homologous proteins. This article discusses data-driven probabilistic sequence models, which are able to extract a multitude of information from sequence data…
The results of simulation of the electron scattering rates in a single graphene layer without substrate are presented. High mobility of charge carriers, maximally obtained among all known materials, makes graphene a promising material for the creation of new semiconductor devices with good output characteristics. The…
The objective of this study is analysing the characteristics of five different solar cell technologies regarding their efficiency, fill factor, cost and environmental impacts and comparing their improvement records over years considering their efficiency. The five solar cell technologies of interest are amorphous sili…
During irradiation in a nuclear reactor, the fuel pellet experiences non-uniform fission rate and strong thermo-mechanical loads, which result in alterations and restructuring occurring non-homogeneously in the fuel volume. The irradiated fuel (see Fig. 1) is characterized by a highly heterogeneous structure, with a c…
This work provides a study on the influence of a rubbery compatibilizer on the morphology and on the physical properties of polypropylene (PP)/polyethylenetherephthalate(PET) melt spun fibers at different hot draw ratios. In particular, a sample of SEBS copolymer grafted with maleic anhydride was used as compatibilize…
Spintronics discusses about fundamental physics and material science in mostly nanometer size structures. Spintronics also delivers many promising technologies for now and the future. One of the interesting spintronic structures is called “Magnetic Tunnel junction” (MTJ). A typical MTJ consists of a thin (1-3nm) insul…
The effect of cold rolled reductions on microstructure and mechanical properties of TiNi alloys was investigated by means of tension test and TEM. From the results it can be determined that when the annealing temperature reached 550 , the recrystallization and grain growth began to occur after the cold deformation, an…