Materials Literature
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The recently developed self consistent {\it ab initio} lattice dynamical method (SCAILD) has been applied to the high temperature bcc phase of La and Th which are dynamically unstable at low temperatures. The bcc phase of these metals is found to be stabilized by phonon-phonon interactions. The calculated high tempera…
The wave nature of electrons in low-dimensional structures manifests itself in conventional electrical measurements as a quantum correction to the classical conductance. This correction comes from the interference of scattered electrons which results in electron localisation and therefore a decrease of the conductance…
Abstract Insulating semiconducting conductors? The electronic properties of graphene can be tuned through molecular charge transfer, induced by organic electron donor (acceptor), TTF (TCNE, TCNQ), molecules. Such molecular‐charge‐transfer process has significant effects on optical and transport properties, in particul…
Well-aligned ultralong ZnO nanorod arrays with a length of 10 microm have been synthesized on glass substrates using a preheating hydrothermal method. The diameter of the nanorods is in the range from 50 to 80 nm, and the aspect ratio and alignment can be simply controlled by varying the preheating time. Based on the…
Iron sandwich on a tungstate bun: Two new polyoxotungstates with paramagnetic iron(III) heteroatoms (see structure, W blue, Fe yellow, O red) possess S=15/2 and S=5 ground states. Both compounds are single-molecule magnets, and the hexairon species shows large hysteresis (see picture) and quantum tunneling effects at…
Polymerase chain reaction (PCR) was realized on the surface of gold nanoparticles (NPs) as a tool for self-organization at nanoscale and as a step toward programmable production of sufficient quantities of functional metallic superstructures. The assembly is controlled by varying the density of the primer on the surfa…
Basics in Phase Morphologies of Multicomponent Polymer-Based Materials Phase Morphology Development in Polymer Blends References Phase Morphology Investigation: Microscopic Tools, Tips, and Selected Scanning Electron Photomicrographs Introduction Sample Preparation for Scanning Electron Micrography References Selected…
Zn 0.96 Mn 0.04 O/ZnO coaxial nanocables were prepared in two steps: ZnO nanowires were synthesized by standard thermal evaporation, followed by depositing Zn 0.96 Mn 0.04 onto the surface of prepared ZnO nanowires using an ultrahigh-vacuum radio frequency magnetron-sputtering system. X-ray diffraction and X-ray photo…
Three-dimensional network of branched fibers of conducting polypyrrole was synthesized by interfacial polymerization method in the presence of sulfonated β -cyclodextrin (Sβ CD) as the dopant. A high surface area of open-pore polypyrrole structure was obtained with the aid of Sβ CD, and the incorporation of Sβ CD unit…
Polar liquid crystalline phases are relevant for fluid liquid crystal phases observed in banana liquid crystals as well as for a class of polymeric liquid crystalline materials investigated recently. In this Brief Report we present the reversible dynamics for polar nematic liquid crystals with C_{infinityv} symmetry,…
We present a compact model of transport through a random distribution of interacting quantum dots embedded in a dielectric matrix. The model is based on a network of interconnected tunnel junctions sandwiched between two electrodes, resulting in a system of nonlinear differential equations which is numerically solved…
Real-time fluorescence spectra from photoactivated individual silver clusters on silver island film were obtained via inserting a transmission grating in the emission light path of an inverted microscope. The high throughput data collection ability allowed us to monitor photochemical dynamics of multiple silver cluste…
Fuel cells operated with hydrogen are more efficient than internal combustion engines, because the combustion in the internal combustion engine is less reversible than the electro-oxidation of hydrogen in the fuel cell. Hydrogen can be produced out of hydrocarbons, such as natural gas, or renewable resources at statio…
ZnO nanorod arrays with different structures were grown on Si substrates at different temperatures by using a chemical vapor transport process. The growth sites and population of ZnO nanorods were controlled by the primarily grown micropyramids. The density and size of these nanorods were greatly affected by the growt…
The present work deals with morphological modifications and physicochemical properties of acetylated Saccharum spontaneum L. through graft copolymerization with methyl methacrylate (MMA) using ferrous ammonium sulfate-potassium persulfate (FAS-KPS) redox initiator. Different reaction parameters such as reaction temper…
The electronic structures of low-doped epitaxial La0.9Hf0.1MnO3 (LHMO) thin films are investigated by x-ray photoemission spectroscopy (XPS) for the first time. XPS spectra of core levels (La 3d, Hf 4f, O 1s, Mn 2p, and Mn 3s) are taken from the cleaned LHMO film surface. Hf 4f spectrum exhibits a typical binding ener…
Using ab initio calculations, we have systematically studied the structure of δ-Bi(2)O(3) (fluorite prototype, 25% oxygen vacancies) probing [Formula: see text] and combined [Formula: see text] and [Formula: see text] oxygen vacancy ordering, random distribution of oxygen vacancies with two different statistical descr…
A new configuration of a combined thermoelectric device, a two-stage thermoelectric heat pump driven by a two-stage thermoelectric generator, is proposed in this article. The thermodynamic model of the combined device is built by using the non-equilibrium thermodynamic theory. The performance characteristics of the ne…
Abstract The bulk free‐radical polymerization of styrene was carried out on a spinning disc reactor (SDR) with prepolymer feeds previously prepared in a stirred batch reactor at 70°C. The SDR significantly enhanced the reaction rate when the conversion of the prepolymer feed was about 50%. There was an optimal disc ro…
Abstract Decay kinetics of the luminescence of Ag – centers doped in NaCl, KBr, and CsBr single crystals have been investigated in the temperature range from 4 K to 260 K. At low temperature, the radiative transitions from the 1 T 1u states in the Ag – centers exhibit the luminescence with the decay time constants of…