Materials Literature
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Este estudo apresenta e compara a composição florística das diatomáceas planctônicas e de sedimentos superficiais das represas de abastecimento do Sistema Alto Cotia (represas Pedro Beicht e Cachoeira da Graça), inseridas na Reserva Florestal do Morro Grande. Foram realizadas coletas em sete estações nos períodos seco…
We investigate the optical properties of non-polar a -plane ZnO film grown on (010) LiGaO 2 substrate by chemical vapor deposition. X-ray diffraction indicates the a -plane orientation and Raman spectroscopy reveals the phase purity. Four distinct features in the near band-edge range are identified as neutral-donor-bo…
Urea-based selective catalytic reduction (SCR) systems have become indispensable for automotive Diesel engines to meet the tightened NOxemission standards. The modeling, estimation, and control of urea- SCR system are more challenging during low-temperature operations than during high-temperature operations, mainly du…
The electron paramagnetic resonance (EPR) spectra of Ce 3+ ions in single crystals of yttrium aluminum garnet have been investigated. It has been found that, in addition to the usually observed EPR signals of Ce 3+ ions located in the regular environment at dodecahedral sites of the crystal lattice, the spectra contai…
Abstract A third world occurrence of rouxelite, ideally Cu2HgPb22Sb28S64(O,S)2, has been identified from the baryte-pyrite-Fe oxides ore of Monte Arsiccio mine, near Sant’Anna di Stazzema (Apuan Alps, Tuscany, Italy). Rouxelite occurs as mm-sized acicular crystals, black in colour, with bluish-violet iridescence, in v…
We report the low temperature synthesis of CdE (E = S, Se and Te) semiconductor nanoparticles capped by anacardic acid, an environmentally benign naturally occurring capping ligand. The cadmium chalcogenide nanoparticles were synthesized by reacting the reduced chalcogen powder with cadmium chloride to form the corres…
The insulation performance of gas insulated switchgear (GIS) against lightning surges is verified by applying a lightning impulse (LI) voltage alone. However, the surge voltage generated in an actual system is superimposed over the ac operating voltage to form a waveform that differs from the LI voltage waveform. For…
This study performed the characterization of the commercial bentonite organoclay named Spectrogel C, showing to its affinity with some petroleum products. The surface area and pore size distribution were measured by the BET method, and presented a low area of 2.7 m3/g. The thermal stability was analyzed by the techniq…
In this work, the passivity of AZ31B alloy in NaOH solutions was studied by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and Mott–Schottky analysis. Potentiodynamic polarization results indicated that decreasing NaOH concentration leads to decrease the corrosion rate of this alloy. EIS re…
Transition metal dichalcogenides (TMDs) are interesting materials for electronic applications due to their layered crystal structure, which offers the potential to realize transistors with ultra-thin or even monolayer body thicknesses [1]. Unlike single-layer graphene, TMDs typically have band gaps in the range of 1-2…
Bowtie Antenna as partial discharge (PD) sensor had been modified to be an Enhanced Bowtie (EBT) which had better performance. But the development of the sensor performance should not be satisfied until here. New model should be researched continuously to achieve better performance. This paper deals with newly develop…
Two-dimensional (2D) atomic crystals and their hybrid structures have recently attracted much attention due to their potential applications. The fabrication of metallic contacts or nanostructures on 2D materials is very common and generally achieved by performing electron-beam (e-beam) lithography. However, e-beam lit…
Electro-migration (EM) failure in interconnects is one of the most important reliability considerations in current advanced semiconductor technologies. As the technology features are pushed to the limit and with the introduction of new materials and increased current densities to satisfy the performance demands, the E…
The effect of Benzyl triphenyl phosphonium chloride (BTPPC) on the corrosion of mild steel in a solution of 0.3 M phosphoric acid has been investigated at various inhibitor concentrations and temperatures by Potentiodynamic Polarization Studies, Potentiostatic Polarization Studies, Electrochemical Impedance Spectrosco…
Abstract The new mineral torrecillasite (IMA2013-112), Na(As,Sb)43+O6Cl, was found at the Torrecillas mine, Iquique Province, Chile, where it occurs as a secondary alteration phase in association with anhydrite, cinnabar, gypsum, halite, lavendulan, magnesiokoritnigite, marcasite, quartz, pyrite, scorodite, wendwilson…
In wafer fabrication, Fluorine (F) contamination may cause F-induced corrosion and defects on microchip Al bondpad, resulting in bondpad discoloration or non-stick on pad (NSOP). In the previous paper [1], the authors studied the F-induced corrosion and defects, characterized the composition of the “flower-like” defec…
This work proves the feasibility of electrically actuated, CMOS compatible, microwave VO2switches on SiO2/Si substrates with low variability, 100% yield, better than 109 cycles lifetime, ultra-steep OFF-ON transition and better RF performance than previously reported VO2switches on Al2O3substrates (flat -0.6 dB S21-ON…
An in-pile performance test of HANA claddings was conducted at up to 67 GWD/MTU in the Halden research reactor in Norway over a 6.5 year period. Four types of HANA claddings (HANA-3, HANA-4, HANA-5, and HANA-6) and a reference Zircaloy-4 cladding were used for the in-pile test. The evaluation parameters of the HANA cl…
An orthogonal experimental design was employed to study the effects of the bath ratio, time, and alkali dosage of alkali treatment on the chemical composition, fineness, average length, and staple rate of hemp fiber. Through normalization and average weight distribution of multiple indices, the quality of hemp fiber w…
Silver nanoparticles (AgNPs) are today one of the most commonly used nanomaterials both in fundamental medical sciences and clinical practice. These nanoparticles are also incor- porated into many commercial products and widely available to general population. However, recent reports have linked silver nanomaterials t…