Materials Literature
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Grain-size dependence of electronic transport and magnetoresistance (MR) properties of nanostructured La0.7Sr0.3MnO3 (LSMO) manganite thin films on LaAlO3 (100) single crystal substrates prepared using Chemical Solution Deposition (CSD) technique have been studied. The LSMO thin films were annealed at temperatures in…
Gadolinium chelates are relatively safe agents, with occasional hypersensitivity reactions and systemic toxicity with predominantly extracellular distribution and primarily glomerular clearance. Neurotoxicity has been estimated at approximately 1% on initial studies regarding the pharmacokinetics of
Pentaerythritol (PENT) was polycondensed with dimethyl sebacate (DMS) in bulk at 240 °C. With Ti(OBu) 4 as the catalyst, an equimolar feed ratio resulted in gelation even when no vacuum was applied. When the PENT/DMS ratio was raised to 1.2/1.0, soluble viscous resins were obtained, but despite the excess of PENT, the…
Nanostructured Ni-doped skutterudites Co 1− x Ni x Sb 3 (with x ranging from 0.01 to 0.09) were prepared by ball milling and direct-current induced hot press. It was found that the thermal conductivity was reduced due to strong electron–phonon scattering from Ni-doping as well as phonon scattering from the increased g…
Abstract BACKGROUND: The technological development of poly(ε‐caprolactone) (PCL) is limited by its short useful lifespan, low modulus and high crystallinity. There are a few papers dealing with the crystallization behavior of carbon nanotube‐reinforced PCL composites. However, little work has been done on the crystall…
3D superlattices of fluorescent gold nanoparticles are prepared at an air/water interface. The hexagonal assembly extends over several micrometers, and crystals of triangular morphology are imaged using the fluorescence emission of the monolayers protecting the nanoparticles (see figure). Surprisingly, the superlattic…
Abstract Conducting polymer nanofibers with controllable chiral mesopores in the size, the shape, and handedness have been synthesized by chiral lipid ribbon templating and “seeding” route. Chiral mesoporous conducting poly(pyrrole) (CMPP) synthesized with very small amount of chiral amphiphilic molecules (usually <…
Density-functional calculations predict half-metallicity in zigzag single-walled carbon nanotubes of finite length with the two ends saturated with hydrogen. We have analyzed the change of the $\ensuremath{\alpha}$- and $\ensuremath{\beta}$-spin electronic gaps under the influence of an electric field applied along th…
BACKGROUND: Functional genomics has particular promise in silkworm biology for identifying genes involved in a variety of biological functions that include: synthesis and secretion of silk, sex determination pathways, insect-pathogen interactions, chorionogenesis, molecular clocks. Wild silkmoths have hardly been the…
Abstract Conductive coatings have been applied to plastic substrates to protect electronic devices against electromagnetic interference. A model, based on the transmission line and plane wave theory, is developed to analyze the shielding effectiveness of multilayer metallic thin films. Analyses show that among absorpt…
Abstract Nature always gives us inspiration for the fabrication of functional materials by mimicking the structural design or stimuli‐responsive capability of biomaterials. However, the strict preparation conditions, multistep processes, and high cost of the methods to create biomimetic systems at the interface and in…
Single-walled carbon nanotube (SWNT) rings have been synthesized via the noncovalent hybridization of carbon nanotubes and porphyrins. Optical absorption spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM) results showed that the formation of the SWNT rings is strongly affected…
In the liquid state, glass-forming Ni59.5Nb40.5 and Ni60Nb34.8Sn5.2 alloys exhibit an extraordinarily high packing fraction. The self-correlation functions measured using quasielastic neutron scattering clearly show the slowing down of microscopic dynamics with an increase in packing fraction. The self-diffusivity in…
We demonstrate that the ONIOM method can be used to optimize a conical intersection between the ground and first excited-state potential energy surfaces of previtamin D (precalciferol), with excitation localized in a small part of the molecule: the hexatriene chromophore. These calculations were up to 100 times faster…
Structural instabilities of ${\text{Cd}}_{2}{\text{Nb}}_{2}{\text{O}}_{7}$ have been explored by all-electron ab initio calculations in the framework of density-functional theory. The calculated phonon-dispersion curve of the cubic high-temperature phase displays several modes with imaginary frequencies. A distortion…
One of the major obstacles for engineering large tissue or organs such as the liver in vitro is the insufficient supply of nutrients and oxygen to the cells growing inside the scaffold, which reduces cell viability significantly. Therefore, vascularization of the scaffolding system is necessary for successful engineer…
Glow discharge plasma electrolysis (GDPE) of ethanol solutions for hydrogen generation was investigated in terms of discharged voltage, discharged polarity and ethanol concentration. H2 and acetaldehyde are the dominant products of ethanol decomposition during GDPE. Discharged polarity, discharged voltage and ethanol…
ZnO nanostructures with a variety of morphologies and sizes, such as urchinlike structures composed of small-head nanonails, vertically aligned nanonails and nanocones, comblike nanostructures, hierarchical nanostructures, etc., have been synthesized via the simple thermal evaporation process onto the steel alloy subs…
We discuss the effect of electron-electron interactions on the static polarization properties of graphene beyond RPA. Divergent self-energy corrections are naturally absorbed into the renormalized coupling constant $\ensuremath{\alpha}$. We find that the lowest-order vertex correction, which is the first nontrivial co…
This study examined the correlation between the thickness of the iron catalyst film deposited by e-beam evaporation and carbon nanotube (CNT) growth by water-assisted chemical vapour deposition. The number of walls and the alignment of the CNTs in the CNT forest could be controlled by the iron thickness. High resoluti…