Shaping optical space with metamaterials
By controlling the local electric and magnetic properties of a material, researchers can tailor the flow of light and create exotic optical devices.
Materials Literature
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Axial Compression of Hierarchically Structured Carbon Nanotube Fiber Embedded in Epoxy
Abstract High mechanical performances of macroscopic‐scale fibers hierarchically constructed with carbon nanotubes (CNTs) are attracting great interest in the materials community owing to their merits of light weight and multiple functionalities. However, from the viewpoint of structural design, many fundamental issue…
Elastic Response of Carbon Nanotube Forests to Aerodynamic Stresses
The ability to determine static and (hydro)dynamic properties of carbon nanotubes (CNTs) is crucial for many applications. While their static properties (e.g., solubility and wettability) are fairly well understood, their mechanical responses (e.g., deflection under shear) to ambient fluid flow are to a large extent u…
Spectroscopic analysis of Eu3+ -and Eu3+:Yb3+-doped yttrium silicate crystalline powders prepared by combustion synthesis
Yttrium silicate powders doped with Eu3+ and codoped with Eu3+ and Yb3+ were prepared by combustion synthesis. The x-ray powder diffraction data showed the presence of Y2SiO5 and Y2Si2O7 crystalline phases. Singly doped (1 wt %) sample illuminated with ultraviolet light (λ=256 nm) showed the characteristic red lumines…
Antibacterial effects of Tungsten nanoparticles on the Escherichia coli strains isolated from catheterized urinary tract infection (UTI) cases and Staphylococcus aureus.
A significant proportion of all incidents of nosocomial infections in acute-care hospitals is due to contaminated catheters. Alternative strategies e.g. antibiotics as well as surface modifications have been devised in an attempt to reduce the incidence of catheter-associated urinary tract infections (CAUTI), but most…
PDC measurements to assess machine insulation
DC testing is probably the most commonly used maintenance and diagnostic tests periodically conducted on machine stator insulation systems. With the commercial availability of more sophisticated equipment it is now possible to continuously monitor both charge and discharge current during a step voltage test, also know…
Optical phonon confinement in ZnO nanorods and nanotubes
The structure and morphology of ZnO nanorods and nanotubes synthesized by hydrothermal method were studied by TEM, XRD and Raman spectroscopy. The Raman scattering spectra at room temperature were excited by He-Ne laser with wavelength 633 nm. The perfect wurtzite structures of ZnO nanorods and nanotubes were verified…
Enhanced Cyanogen Chloride Removal by the Reactive Zirconium Hydroxide Substrate
A novel microporous sorbent consisting of zirconium hydroxide impregnated with triethylenediamine (TEDA) was evaluated for the removal of cyanogen chloride. Breakthrough data were collected on packed beds, illustrating the efficacious nature of TEDA and the enhanced cyanogen chloride removal from the basic zirconium h…
Enhancement of thermoelectric efficiency in type-VIII clathrate Ba8Ga16Sn30 by Al substitution for Ga
Single-crystalline samples of type-VIII clathrate Ba8Ga16−xAlxSn30 (0≤x≤12) were grown from Sn flux to characterize the structural and thermoelectric properties from 300 to 600 K. The lattice parameter increases by 0.5% as x is increased to 10.5 whose value is the solubility limit of Al. The Seebeck coefficients of al…
Carbon nanotube-guided thermopower waves
Thermopower waves are a new concept for the direct conversion of chemical to electrical energy. A nanowire with large axial thermal diffusivity can accelerate a self-propagating reaction wave using a fuel coated along its length. The reaction wave drives electrical carriers in a thermopower wave, creating a high-power…
MENZERITE-(Y), A NEW SPECIES, [(Mg,Fe2+)(Fe3+,Al)](Si3)O12, FROM A FELSIC GRANULITE, PARRY SOUND, ONTARIO, AND A NEW GARNET END-MEMBER, [Mg2](Si3)O12
Menzerite-(Y), a new mineral species, forms reddish brown cores, n = 1.844 (20), up to 70 μm across, rimmed successively by euhedral almandine containing up to 2.7 wt% Y 2 O 3 and by K-feldspar in a felsic granulite on Bonnet Island in the interior Parry Sound domain, Grenville Orogenic Province, Canada. It is named a…
Solution-Based TiO2−Polymer Composite Dielectric for Low Operating Voltage OTFTs
The cross-linking reaction of a TiO(2)-polymer composite (TPC) dielectric with poly(4-vinyl phenol) (PVP), a TiO(2) precursor, and poly(melamine-co-formaldehyde) is demonstrated: We suggest that the dense chemical structure of TPC is caused by the alkoxyl group of the PVP cross-linker, poly(melamine-co-formaldehyde) m…
Monitoring of Magnetic Targeting to Tumor Vasculature Through MRI and Biodistribution
AIMS: The development of noninvasive imaging techniques for the assessment of cancer treatment is rapidly becoming highly important. The aim of the present study is to show that magnetic cationic liposomes (MCLs), incorporating superparamagnetic iron oxide nanoparticles (SPIONs), are a versatile theranostic nanoplatfo…
Surface Eu-Treated ZnO Nanowires with Efficient Red Emission
The structural and optical properties of post surface Eu-treated ZnO nanowires (NWs) have been investigated systematically. It is found that the Eu 3+ ions are in the Eu 2 O 3 -like state located at the surface of ZnO NWs. Sharp intense red emissions in the range of 580−650 nm due to the intra-4 f transition of Eu 3+…
Influence of insulating spacer type on propagation properties of PD-induced electromagnetic wave in GIS
The authors have studied insulation diagnostic technique of gas-insulated switchgear (GIS) by UHF (ultra high frequency) method. In this paper, the authors investigated the effect of insulating spacer type (metal flange type (MT) or bush type (BT)) on the propagation properties of partial discharge (PD) induced electr…
Modelling and Performance Evaluation of Solid Oxide Fuel Cell for Building Integrated Co‐ and Polygeneration
Abstract Models of fuel cell based combined heat and power systems, used in building energy performance simulation codes, are often based on simple black or grey box models. To model a specific device, input data from experiments are often required for calibration. This paper presents an approach for the theoretical d…
On the effects of liquid-gas interfacial shear on slip flow through a parallel-plate channel with superhydrophobic grooved walls
Comparisons between slip lengths predicted by a liquid-gas coupled model and that by an idealized zero-gas-shear model are presented in this paper. The problem under consideration is pressure-driven flow of a liquid through a plane channel bounded by two superhydrophobic walls which are patterned with longitudinal or…
Influence of Ag thickness on structural, optical, and electrical properties of ZnS/Ag/ZnS multilayers prepared by ion beam assisted deposition
The structural, optical, and electrical characteristics of zinc sulfide (ZnS)/Ag/ZnS (ZAZ) multilayer films prepared by ion beam assisted deposition on k9 glass have been investigated as a function of Ag layer thickness. The characteristics of ZAZ multilayer are significantly improved up insertion of optimal Ag thickn…
Plasmons in nanoscale and atomic-scale systems
Plasmons in metallic nanomaterials exhibit very strong size and shape effects, and thus have recently gained considerable attention in nanotechnology, information technology, and life science. In this review, we overview the fundamental properties of plasmons in materials with various dimensionalities and discuss the…
Hydrogen storage and phase transformations in Mg–Pd nanoparticles
Microstructure refinement and synergic coupling among different phases are currently explored strategies to improve the hydrogen storage properties of traditional materials. In this work, we apply a combination of these methods and synthesize Mg–Pd composite nanoparticles by inert gas condensation of Mg vapors followe…