Electron Beam-Induced Charging and Modifications of Thin Films
Marek Malac, Marco Beleggia, Teddy Rowan, Ray Egerton, Masahiro Kawasaki, Yoshio Okura, Robert A McLeod; Electron Beam-Induced Charging and Modifications o
Materials Literature
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Crystallization behaviour of Y 2 O 3 doped germanate oxyfluoride glass-ceramics
Glass-ceramics in the CaF 2 –BaO–Al 2 O 3 –SiO 2 –GeO 2 system with the addition of 9·30 wt% Y 2 O 3 were prepared using the conventional melt quenching and subsequent heat treated crystallization method. The influence of Y 2 O 3 on the crystallization behaviour and properties of germanate glasses were investigated by…
Automated recognition of partial discharge in oil-immersed insulation
This paper presents an application of pattern recognition techniques for identification of partial discharge sources in oil-immersed insulation. Three sources of partial discharge are simulated to generate artificial partial discharge data; bubble wrap to simulate air bubbles, needle to simulate corona discharge, and…
Reduction Kinetics of Thermally Reduced Graphene Oxide Thin Films
We report an experimentalstudy of thermal reduction of graphene oxide (GO) under nitrogen flow.Ultrathin films of GO were prepared on quartz glass substrates by spin-coatingfrom 3 mg/ml aqueous solutions of GO. These films were annealed at 50 °C under vacuum overnight before thermal reduction.The films were exposed to…
Electrospun Polyvinylpyrrolidone as a Carrier for Leaves Extracts of <i>Anredera cordifolia </i>(Ten.) Steenis
Nanofibers produced by electrospinning method have high porosity, large surface area, long size, and their dimensions are ranging from nanometers to micrometers. The synthesis process was straightforward, uncomplicated and it can be processed from various type of materials and the nanofibers can be used as drug releas…
Microwave dielectric properties of Nextel-440 fiber fabrics with pyrolytic carbon coatings in the temperature range from room temperature to 700 °C
Pyrolytic carbon (PyC) coatings are deposited on the Nextel-440 fiber fabrics by chemical vapor deposition (CVD). The dielectric properties of the Nextel-440 fiber fabrics with PyC coatings (Nextel-440/PyC) are investigated in a temperature range from room temperature to 700 °C in X -band. Compared with the permittivi…
Simulation of a Symmetry Metamaterial Waveguide Absorber(TE&TM)
This communication presents a simulation of metamaterials absorber in lossy waveguide structure for solar cell applications. Both transverse electric (TE)and transverse magnetic (TM) waves propagating in a three layered waveguide structure containing metamaterials as thin film have been studied in infrared and visible…
Band gap engineering in finite elongated graphene nanoribbon heterojunctions: Tight-binding model
A simple model based on the divide and conquer rule and tight-binding (TB) approximation is employed for studying the role of finite size effect on the electronic properties of elongated graphene nanoribbon (GNR) heterojunctions. In our model, the GNR heterojunction is divided into three parts: a left (L) part, middle…
Effect of the development of electrical parallel discharges on performance of polluted insulators under DC voltage
Our work consists of studying the development of parallel discharges on a broad insulating surface simultaneously under uniform pollution's conditions and DC voltage. This phenomenon plays a very important role on the electric performance of this insulation. The parameters of influence considered in this paper are the…
Disorder-driven phase transition in La0.37D0.30Ca0.33MnO3 (D = Bi, Sm) manganites
In the present work we report the structural, electron spin resonance (ESR) and magnetic properties of La0.37D0.30Ca0.33MnO3 (D = Bi, Sm) manganites synthesized by sol-gel method. The critical behavior at the critical point, where the system undergoes phase transition from paramagnetic (PM) to ferromagnetic (FM) state…
Room-temperature ferromagnetism in cerium dioxide powders
Room-temperature ferromagnetism is detected in a CeO 2 powder with a grain size of about 35 nm and a low (<0.1 at %) manganese and iron content. The ferromagnetism in a CeO 2 sample with a submicron crystallite size and the same manganese and iron impurity content is lower than in the nanocrystalline sample by an orde…
Optimizing Plasmonically Enhanced Upconversion
The light-focusing capability of metal nanoparticles in a periodic square array on top of an upconverting thin film was modeled using the finite-element-frequency-domain method. The particle geometry was optimized for efficient concentration of an incoming plane wave into the upconverting medium, in order to enhance t…
High-Throughput SEM via Multi-Beam SEM: Applications in Materials Science
Joseph R Michael, Craig Y Nakakura, Tomasz Garbowski, Anna Lena Eberle, Thomas Kemen, Dirk Zeidler; High-Throughput SEM via Multi-Beam SEM: Applications in
Studying Shocked Material Dynamics with Ultrafast X-rays
RL Sandberg, C Bolme, K Ramos, Q McCulloch, R Martinez, V Hamilton, T Pierce, M Greenfield, S McGrane, JL Barber, B Abbey, A Schropp, F Seiboth, P Heiman,
Structure and Vibrational Studies of ±1-(1H-Benzoimidazol-2-YL) Ethanol, Using DFT Method
In this study, conformational analysis and quantum chemical calculations of 1-(1H-Benzoimidazol-2-YL) Ethanol were carried out. The geometric structure, infrared intensities, UV-VIS spectrum, HOMO-LUMO energies, 1 H and 13 C nuclear magnetic resonance (NMR) chemical shifts were calculated by using the density function…
Correlation of the magnetic and transport properties with polymorphic transitions in bismuth pyrostannate Bi2(Sn1 − x Cr x )2O7
The correlation of the electrical, magnetic, and structural properties of Bi2(Sn1 − x Cr x )2O7 solid solutions has been investigated for two compositions with x = 0.05 and 0.1. The temperatures of structural phase transitions and anomalies of the electrical resistance in the vicinity of these transitions at temperatu…
Epitaxial layers of nickel fluoride on Si(111): Growth and stabilization of the orthorhombic phase
The growth and crystal structure of NiF2 layers on CaF2/Si(111) heteroepitaxial substrates have been investigated. It has been shown that molecular beam epitaxy at temperatures of 350–450°C provides a stable epitaxial growth of the metastable orthorhombic NiF2 phase (structural type CaCl2) with a nickel fluoride layer…
Influence of nano-SiO2 and BN on space charge and AC/DC performance of epoxy nanocomposites
In this paper, the high purity bisphenol-A diglycidyl ether (DGEBA) epoxy resin (D.E.R 332), which is mainly used as filament winding, electrical laminates and encapsulation applications, was used as a host. The epoxy resins were loaded with nano-SiO 2 and nano-BN in different loading concentrations, and then test of…
Graphene-based polymer composites: What about it for the HV electrotechnical arena?
In this study, considerations of recent work and new acquired data by the present authors were used to propose an appreciation of the use of graphene-based polymer composites for electrotechnical applications. In particular, electrical charge behavior of specially prepared Polyethyle-Graphene Oxide (GO) was studied an…
Effect of Soaking Time in Alkali Solution on the Interfacial Shear Strength of Cantala Fiber/Recycled HDPE Composites
The interfacial shear strength (IFSS) between natural fibers and thermoplastics matrix is one of the key parameters to increase the mechanical properties of composites. IFSS can be improved by alkali treatment. Therefore, the research is to investigate the influence of IFSS soaking time in alkali solution of cantala f…