Materials Literature
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ZnO powder was mechanically milled in a ball mill. This procedure was found to greatly increase its evaporation ability. The anomalous evaporation behaviour was caused by the disordered structure of the milled material and was not related to the increase in its surface area after milling. ZnO nanowires were synthesize…
The complex analysis of dielectric/capacitance is a very useful approach to separate different polarization contributions existing in polycrystalline ceramics. In this letter, the authors use this type of spectroscopic analysis to separate the bulk’s dielectric dipolar relaxation contributions from the polarization co…
We describe herein the preparation of silver nanoparticles (AgNPs) using nucleobase adenine as protecting agent through the in situ chemical reduction of AgNO 3 with NaBH 4 in an aqueous medium at room temperature. As-prepared AgNPs were characterized by UV–visible spectra, transmission electron microscopy and x-ray p…
The authors investigated the magnetic and ferroelectric properties of hexagonally grown HoMnO3 thin films. The magnetic measurements revealed bulklike magnetic phase transitions with an additional spin-glass-like behavior feature below the Néel temperature. The ferroelectricity in the films was distinctly different fr…
Using multispeckle x-ray photon correlation spectroscopy, we have measured the slow, wave-vector-dependent dynamics of concentrated, disordered nanoemulsions composed of silicone oil droplets in water. The intermediate scattering function possesses a compressed exponential line shape and a relaxation time that varies…
The authors present the fabrication and electrical characterization of carbon nanofiber-based flexible field emitters prepared by an ion beam technique. The flexible emitters are extremely robust under various stress conditions and show no sign of degradation after 16h long lifetime test. An all-plastic flexible field…
Abstract The simultaneous polymerization and crystallization of aniline has been reported earlier. In this article, the X‐ray crystal structure analysis, SEM morphological analysis and electrical properties of such crystals of oligo‐polyanilines are being reported. The structural analysis shows a pseudo‐orthorhombic l…
The graphene interlayer spacing in pure graphite is known to have a minimum value of ${d}_{\mathit{min}}=0.3354\phantom{\rule{0.3em}{0ex}}\mathrm{nm}$, while defective graphites typically have larger interlayer spacings. Using x-ray diffraction, we find that the graphene interlayer spacing in multi-walled carbon nanof…
A quantum-mechanical potential barrier model for estimating the number ratio between different valence cations in multiatom compounds is proposed. It is supposed that there is a potential barrier between a cation-anion pair. The height of the potential barrier is proportional to the ionization energy of the cation, an…
Abstract Polymer clay nanocomposites (PCN) of Polyamide6 and sodium montmorillonite are prepared using different organic modifiers (12‐aminolauric acid, n ‐dodecylamine, and 1,12‐diaminododecane) to study effect of organic modifiers on structure and nanomechanical properties of PCN. Using X‐ray diffraction and differe…
Different In 2 O 3 nanostructures, including nanowires, novel nanoarrows and nanorods, were synthesized through introducing the catalyst and adjusting the source material in the chemical vapour deposition (CVD) route. The morphologies and crystalline structures are characterized by x-ray diffraction (XRD), field emiss…
The impact of the residual strain induced by the thermal strain on the dielectric tunability was systematically studied for rf sputtered (100)-one-axis-oriented polycrystalline (Ba0.5Sr0.5)TiO3 films. These films were grown on various substrates with different thermal expansion coefficients [α(sub)] covered with a sta…
BAB amphiphilic triblock copolymers consisting of poly(ethylene glycol) (B) (PEG) as the hydrophilic segment and different polyesters (A) as the hydrophobic block were prepared by a polycondensation reaction as efficient model core–shell nanoparticles to assay the effect of interactions between the hydrophobic drug an…
Amplified spontaneous emission (ASE) from high-quality crystal of cyano substituted oligo(p-phenylene vinylene) with very high photoluminescent efficiency is observed. The full widths at half maximum of the narrowed spectra can reach 10nm when the pumping energy is 50μJ/pulse. The threshold for ASE is about 7.9μJ/puls…
Cross-linking of electrospun (e-spun) fibre mats (beaded fibre morphology with the average diameter of the fibre segments between beads being ∼108 nm) of poly(vinyl alcohol) (PVA) containing sodium salicylate (SS), used as the model drug, was achieved by exposing the fibre mats to the vapour from 5.6 M aqueous solutio…
Aligned single-crystal manganese vanadate (MnV 2 O 6 ) lath-like nanorods with diameters of 20–30 nm and lengths up to 2–4 µm have been fabricated via a simple hydrothermal route at low temperature (180 °C) using V 2 O 5 gel as the precursor. X-ray diffraction, field-emission scanning electron microscopy, transmission…
Magnetic films having in the gigahertz range high real permeability μ′ and yet exhibiting weak imaginary permeability μ″ (thus low in tanδ=μ″∕μ′) are in great need recently, for use in next-generation magnetic devices such as radio frequency identification (RFID) tags utilizing 900MHz or 2.45GHz band. In this study we…
Polycrystalline TbxNd1−xFe1.9 (0⩽x⩽0.8) cubic Laves phase alloys with MgCu2-type structure were prepared by high-pressure synthesis and subsequent low-temperature annealing. The crystal structure, magnetic properties, and magnetostriction have been investigated. The change of easy magnetic direction from ⟨100⟩ to ⟨111…
Abstract We report a facile method to accomplish the crosslinking reaction of PVA with SWNTs, MWNTs, and C‐60 using MW irradiation. Nanocomposites of PVA crosslinked with SWNT, MWNT and C‐60 were prepared expeditiously by reacting the respective carbon nanotubes with 3 wt.‐% PVA under MW irradiation, maintaining a tem…
We have developed a lithography-free, all-dry process for fabricating graphene devices using an ultrathin quartz filament as a shadow mask. This technique, which is free of the possible contamination of graphene during lithographic process, is simple to implement, versatile, and capable of achieving high throughput. W…