Materials Literature
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Magnetic nanoparticles have promising applications in spintronics, for example, to make single particle spintronic devices. The combination of widely accessible Fe and Si makes up a system of great interest and potential. Fe3Si phase is considered to be similar with Heuslar alloy, which could lead to high spin polariz…
We report results of molecular-dynamics simulations for the effects of atomic hydrogen chemisorption on the structure and deformation of single-walled carbon nanotubes. Upon hydrogenation, the nanotubes expand and the degree of expansion depends on the hydrogen coverage. There is a critical hydrogen coverage, ∼25%–30%…
This work investigates the possibility of using plasmas to treat high boiling point and viscous liquids (HBPVL) and cokes resulting as secondary streams from the refining of oil. For their revalorisation, the use of microwave (MW) induced plasmas of water is proposed, as an alternative to more conventional processes (…
We report here boron-11 and hydrogen NMR measurements of the lifetime of BH 4 units in molten LiBH 4, with respect to hydrogen exchange. A well-resolved 11 B pattern of B−H J-couplings yields a lower limit of 16 ms on the BH 4 lifetime at 285 °C. Carr−Purcell−Meiboom−Gill multiple spin−echo measurements, both on 11 B…
Large-area and crack-free films of CuO nanoneedle arrays were synthesized by heating ZnO coated copper foils at a temperature of 400 °C. Scanning electron microscopy shows that the cracking and exfoliation of CuO nanoneedle films are effectively eliminated by predeposition of ZnO layers by a solution route before the…
Readily available, air-stable TCNQH2 affords numerous crystalline derivatives containing discrete TCNQ2− anions, until now a very rare redox level. The work opens the way for the generation of an almost unlimited number of TCNQ-based materials, in a very simple manner, with new structural features and properties.
Thermal and chemical (antibacterial) properties of Ag nanoparticles deposited on the surface of SiO 2 were studied to know the possibility of applying them as antibacterial materials. To prevent aggregation of Ag nanoparticles and increase their antibacterial abilities, hybrid structures of Ag−SiO 2 nanocomposites wer…
Leakage current detection is a promising method for measuring pollution levels on insulators of overhead transmission lines. This paper describes the development of a leakage current sensor based on a fiber-coupled light-emitting diode, as well as the development of a processing module that detects, stores, and classi…
Prior continuum models of van der Waals force between carbon nanotube walls assume that the pressures be either the same on the walls or inversely proportional to wall radius. A new continuum model is obtained analytically from the Lennard-Jones potential for van der Waals force, without the above assumptions. Bucklin…
We have investigated the effect of oxygen on the surface coercivity of Nd-coated Nd–Fe–B sintered magnets as a model experiment to understand the coercivity mechanism. The coercivity values of the surface Nd2Fe14B grains of Ta-coated and uncoated Nd(2 μm)/Nd–Fe–B magnets were compared after annealing at 400 to 600 °C…
The layered perovskite CsBiNb 2 O 7 has been reinvestigated in the light of recent predictions of ferroelectric behavior. Variable temperature powder neutron diffraction experiments show that this material retains polar symmetry (space group P 2 1 am ) up to at least 900 °C, with only a slight decrease in net polariza…
V 2 O 5 nanorods with remarkable visible light emission were synthesized by heating a V2O3 thin film in air at ∼530 °C due to the involvement of oxygen defects. The density of defects in the nanorods can be decreased by applying a magnetic field of 5 T during this transition, resulting in drastic decrease in the inten…
Abstract The present work deals with the numerical investigation of a collapsing bubble in a liquid–gas fluid, which is modeled as a single compressible medium. The medium is characterized by the stiffened gas law using different material parameters for the two phases. For the discretization of the stiffened gas model…
Non-destructive method of spectroscopic ellipsometry (SE) from IR to FUV was applied to study PEDOT/PSS thin films deposited by spin coating from aqueous dispersions of the material with different N,N-Dimethylformamide (DMF) volume percent. In our work we used the Tauc-Lorentz model to describe the dielectric function…
Triangular wurtzite CdS nanocrystals (see image) with good stability and photoluminescence can be synthesized through a rational solvothermal route. The as-prepared triangles are ideal building blocks for the construction of 3D superlattices to explore novel optical properties.
Mesoporous silica nanoparticles are being explored as versatile tools for various biomedical and biotechnological applications including disease diagnosis, drug delivery, and intracellular imaging. In this paper, the synthesis and characterization of a fluorescent hybrid mesoporous silica nanomaterial, which is noncyt…
(2) H NMR investigations on the biaxial phase behavior of smectic-A liquid crystalline side-chain elastomers are presented. Biaxiality parameters were determined by measuring the quadrupolar splitting of two spin probes, namely benzene-d(6) and hexamethylbenzene-d(18) , at various angles between the principal director…
Antireflective nanosponges are fabricated on polycrystalline silicon (poly-Si) thin films using Ag-nanoparticles (NPs) assisted etching. Crystal orientations and grain sizes of the poly-Si thin films are investigated for the poly-Si nanosponge formation and the resultant optical properties. The Ag-NPs assisted etching…
In this study, a nearly lattice-matched (100) γ-LiAlO 2 single crystal was demonstrated as a potential substrate for the epitaxial growth of nonpolar ZnO materials. The adopted growth approach is a simple chemical vapor deposition (CVD) method. The orientation was identified as the [10−10] orientation ( m -plane) by t…
The phase stability of cubic Mg0.55Zn0.45O thin film grown by metal-organic chemical vapor deposition was studied through continuous thermal annealing. The crystal quality and surface smoothness were greatly improved after a continuous thermal annealing at 750 °C. It is attributed to the reducing of interstitial Zn by…