Materials Literature
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A circular polarization reconfigurable dipole antenna allowing switching between two circular polarizations is proposed. It consists of a linearly polarized dipole antenna and array of polarization dependant EBG structures as the ground plane. Switching elements are used on the ground plane to get the required reflect…
Anahita Pakzad, David J Stowe, Steve Nagy, Jason R Mantei, John-Bruce Green; Cathodoluminescence of Polymeric Materials, Microscopy and Microanalysis, Volu
This paper deals with a three-phase power system with hybrid transformer (HT). The HT contains a conventional transformer with electromagnetic coupling and PWM AC line chopper integrated with the secondary windings through an electric coupling. The HT uses a three-phase Yy connected transformer with additional seconda…
The growing usage of carbon nanotubes (CNTs) in different applications increases concern of negative influence of CNTs on human health. Therefore the control of CNTs is significant and filtration is an effective method to control airborne CNTs. We investigated penetration of airborne CNTs through nanofiber filters com…
A novel high efficiency transformer-based flyback dc-dc converter with maximum power point tracking (MPPT) and zero current switching (ZCS) control is proposed in this paper. By adding a new primary side, the transformer works in flyback mode and the ordinary n-well process is used rather than twin-well. The startup p…
Aluminum alloys used in the manufacture of automotive parts, such as piston, wherein the component is fast moving parts, which would have to meet certain physical and mechanical properties such as wear resistance and hardness. To improve the physical and mechanical properties such as wear resistance and hardness in al…
F Bauer, S Sitzman, C Lang, C Hartfield, J Goulden; Advancing Materials Characterization in the FIB-SEM with Transmission Kikuchi Diffraction, Microscopy a
ES Reifler, NT Nuhfer, E Towe; Structure and Optical Properties of Some Layered Two-Dimensional Transition-Metal Dichalcogenides: Molybdenum Disulfide, Mol
In recent years, considerable progress has been made in the simulation of ferritic steel welding processes. The successful validation of a single-pass autogenous TIG beam weld in SA508 Gr.3 Cl.1 steel has identified key simulation variables required for the accurate prediction of post-weld residual stress in ferritic…
Nesta investigação, diversos resíduos incolores ou coloridos pós-consumo de polietileno de alta densidade (PEAD) foram caracterizados através do índice de fluidez (MFI) e da calorimetria exploratória diferencial (DSC). A equação de Avrami modificada por Jeziorny, e os modelos de Kissenger e Friedman foram utilizados p…
This paper demonstrates photoinduced dissociation of complexes of CdSe/ZnS quantum dots with molecules of 1,2-pyridylazo naphthol under the action of external radiation of various spectral compositions and powers. It is found that energy transport from the quantum dots to the azo dye molecule appreciably contributes t…
In modern technology of biomedical applications, the potential of carbon nanotubes based materials has been widely used in recent years. In this paper, the preparation of the multi wall carbon nanotube (MWCNT) with biocompatibility of these composite are investigated, although many aspects have been studied separately…
Nuclear forward scattering from 57Fe isotope has been used to study depth-dependent magnetic properties of a thin Fe layer on MgO (0 0 1) substrate. Depth selectivity is achieved by using a wedge shaped Fe film with 3 nm thick 57Fe layer incorporated at varying depth. Present studies provide clear evidence against the…
With the increasing of the amount of composite insulators in power network, the transmission accidents caused by the fault of composite insulators are increased and the aging of composite insulators should be paying more attention. In the paper, fourier transform infrared spectroscopy (FTIR) is used to analysis the mo…
In order to increase the life of bituminous pavement, quality of bitumen needs to be enhanced and modified. Different dosages of nano-organic montmorillonite (nano-OMMT) were used as modifier for base asphalt. The effect of the contents of nano-OMMT on high temperature performance of asphalt was investigated. Experime…
This work focuses on the resistive switching behavior of sol-gel spin coated zinc oxide (ZnO) thin films on ITO substrate. The deposited ZnO thin films were annealed at various temperatures from 300°C to 500°C in a furnace for 60 minutes in order to study the effect of annealing temperature on the resistive switching…
Nanostructured Aluminium (Al) doped zinc oxide (ZnO) was prepared using sol-gel spin-coating method. These films were tested under different exposure of oxygen flow rates at room temperature with bias voltage applied at 5 V. The structural properties were characterized using Atomic Force Microscopy (AFM) and Field Emi…
Amorphous CuZnSnS precursor lms were prepared by solgel and spin-coating with copper chloride, zinc chloride, tin chloride and thiourea solutions as starting materials. A Cu2ZnSnS4 lm with kesterite structure and a small amount of chlorine formed when the precursor was annealed under Ar ambient at temperature above 20…
Four new meso-tetraphenylporphyrin derivatives were prepared, singly and doubly substituted with thiocarbamate and thioacetate groups. These compounds were subsequently attached to gold nanoparticles suspended in chloroform. Very different kinetics of the attachment were revealed; the process was much faster for the t…
Quasicrystals are aperiodic structures with no periodicity both in direct and reciprocal space. The diraction pattern of quasicrystals consists however of the periodic series of peaks in the scattering vector space. The intensities of the peaks of all series reduced in a proper way build up the so-called envelope func…