Materials Literature
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Full circle: Cyclic main-chain phenylazo naphthalene polymers were prepared by “click” chemistry. The properties of the cyclic polymers, such as photoisomerization behavior, glass transition temperature (Tg), fluorescence emission, fluorescence lifetime, photoinduced surface relief grating (SRG), and birefringence wer…
Highly conducting Al doped ZnO(AZO)/Cu/AZO triple multilayer thin films were deposited on polyethersulfonesusbtrate at room temperature. We investigated the structural, electrical, optical, and mechanical properties of triple multilayers as a function thickness of Cu layers. The triple multilayer with flexible substra…
This study was motivated by the possibility of using N resonant levels interacting with the GaAs conduction band, in GaN${}_{x}$As${}_{1\ensuremath{-}x}$ ($0<x<2.5%$), to enhance the density of states effective mass (${m}_{\mathrm{d}}$) and consequently the thermoelectric power factor (${S}^{2}\ensuremath{\sigma…
We report the properties of thermally evaporated Ge11.5As24Se64.5 chalcogenide films ion implanted at energies of 2.25MeV with Erbium at concentrations up to 0.4 mol%. The effect of post implant annealing on the refractive index of the films and on the 4I13/2→4I15/2 Er transition was studied. Photoluminescence was fou…
Ag/SiO2 core shell nanoparticles can be potentially useful in solar cells with the expectation to enhance light absorption. Thermal stability of such nanoparticles would be an important issue and has not been investigated much in the past. This research studied both morphological and optical absorption changes when he…
Abstract A series of systematic experimental investigations are reported, using a beryllium-containing oven to seed a controlled and adjustable amount of impurities into a steady-state plasma. Beryllium impurity seeding of the plasma is used to simulate redeposition of eroded material to investigate the relationship b…
This study examined the effects of the epoxidized castor oil (ECO) and <TEX>$Al_2O_3$</TEX> content on the thermal stability and fracture toughness of the diglycidylether of bisphenol-A (DGEBA)/ECO/<TEX>$Al_2O_3$</TEX> ternary composites using a range of techniques. The thermal stability of the composites was decrease…
Abstract Meyer sets have a relatively dense set of Bragg peaks, and for this reason they may be considered as basic mathematical examples of (aperiodic) crystals. In this paper we investigate the pure point part of the diffraction of Meyer sets in more detail. The results are of two kinds. First, we show that, given a…
In this paper we investigate the complex transformation of the magnetoelectric properties from the collinear A-type phase to the multiferroic noncollinear spin cycloid in the solid solution Nd${}_{1\ensuremath{-}x}$Y${}_{x}$MnO${}_{3}$ from compositions of $x=0.3$ to 0.55 in single crystal samples. Neutron diffraction…
In the terms of the muffin-tin and local density functional approximations, a relativistic version of linear augmented cylindrical wave method is developed and applied to calculating the gaps in the Fermi energy region induced by the spin-orbit coupling in the armchair tubules ( n , n ) (where 4 ≤ n ≤ 12). Due to the…
Abstract In winter 2010, the carbon plasma-facing components (PFCs) of HT-7 were changed for molybdenum PFCs. The surface area of the wall that was covered with Mo was about 1.28 m 2 . In the following experimental campaign, the plasma was first operated with Mo PFCs; then 28 successive lithium coatings were carried o…
A new technique for estimation of signal-to-noise ratio in scanning electron microscope images is reported. The method is based on the image noise cross-correlation estimation model recently developed. We derive the basic performance limits on a single image signal-to-noise ratio estimation using the Cramer-Rao inequa…
This study aimed to increase the percentage of the storage capacity of TiFe alloys, which are used for hydrogen storage. The TiFe alloys are capable of very high pressure storage. In this study, for the purpose of activation of storage alloy in low pressures, the required parameters were applied one by one. After abou…
Natural clinoptilolite (mixture from clinoptilolite, quartz and muscovite) is activated with palladium and tested for hydrogen adsorption capability at temperatures RT - 200°C. Thermogravimetric and volumetric methods showed that zeolite activated with palladium (1.25%wt) shows markedly high hydrogen adsorption capaci…
This letter presents the design of a reduced acoustic cloak that uses a temperature gradient in order to obtain sound speeds larger than in air. The cloak consists of a circular acoustic crystal made of ten concentric layers of rigid cylinders whose surfaces are heated or cooled in order to get the temperature gradien…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Carolina Abs da Cruz, Wu Li, Nebil A. Katcho, Natalio Mingo; Role of phonon anharmonicity in time…
With assistance from a nano-manipulator system inside a scanning electron microscope chamber, mechanical and electrical properties of ZnO nanorings were investigated. The change of a fractured nanoring to nearly straight nanobelts was strong evidence to support the previously proposed electrostatic-force-induced self-…
The corrosion inhibition of copper-nickel alloy by Ethylenediamine (EDA) and Diethylenetriamine (DETA) in 1.5M HCl has been investigated by weight loss technique at different temperatures. Maximum value of inhibitor efficiency was 75% at <TEX>$35^{\circ}C$</TEX> and 0.2 M inhibitor concentration EDA, while the lower v…
The magnetoelectric (ME) coupling of CoFeB/Ru/CoFeB synthetic antiferromagnetic (SAF) structure is studied at room-temperature when the SAF structure was deposited on the (011)-Pb(Mg1/3Nb2/3)O3-PbTiO3 piezoelectric substrate. It was found that the magnetoelectric coupling showed butterfly like curve when measured in t…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Zhiyun Zhao, Xuechao Zhai, Guojun Jin; Bipolar-unipolar transition in thermospin transport throug…