Materials Literature
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As the field of tissue engineering evolves, there is a tremendous demand to produce more suitable materials and processing techniques in order to address the requirements (e.g., mechanics and vascularity) of more intricate organs and tissues. Electrospinning is a popular technique to create fibrous scaffolds that mimi…
We report on a colloidal synthesis of PbSe/TiO 2 heterostructures, comprising small-diameter PbSe nanocrystals epitaxially grown onto the surface of TiO 2 nanorods. The deposition of lead selenide onto prefabricated TiO 2 nanocrystals proceeds via formation of a thin PbSe shell that subsequently breaks into sub-2-nm i…
Kinetic Monte Carlo simulations, based on parameters obtained with density-functional theory in the local-density approximation and experimental data, are used to study bulk precipitation of ${\text{Y}}_{2}{\text{O}}_{3}$ in $\ensuremath{\alpha}$ iron. The simulation involves realistic diffusion mechanisms, with a rap…
Carbohydrate-functionalized oligothiophenes have been synthesized applying mild Sonogashira cross-coupling conditions. In an aqueous environment the amphiphilic hybrids self-assemble into chiral superstructures as a result of multiple hydrogen bond interactions and the helicity of the aggregates is controllable by the…
Some good percs: Ferroelectric/ferrimagnetic composite ceramics with percolation thresholds of 0.85–0.95 were obtained by an in situ sol–gel process that leads to enwrapping and separation of the conductive ferrite by a ferroelectric phase, e.g. BaTiO3. Such a super high threshold leads to a sharp increase in permitti…
The structures of Si(n) (n = 2-33) were confirmed by genetic algorithm (GA)/tight binding (TB) search and ab initio calculations at the B3LYP/6- 311++G(2d) and PW91/6-311++G(2d) level, respectively. The fragmentation energies, binding energies, second differences in energy, and highest occupied molecular orbital (HOMO…
A new solid-sate donor-acceptor system based on periodic mesoporous organosilica (PMO) has been constructed. Viologen (Vio) was covalently attached to the framework of a biphenyl (Bp)-bridged PMO. The diffuse reflectance spectrum showed the formation of charge-transfer (CT) complexes of Bp in the framework with Vio in…
A detailed analysis of the value of zero-field splitting for the di- and trivalent chromium hexaquo complexes is presented. The effect of the Jahn-Teller distortion was studied, for the case of the divalent complex, through the use of state-averaged CASSCF calculations, for the mapping of the potential energy surface…
This short review addresses the adiabatic shear failure mechanism (adiabatic shear banding—ASB) in metals subjected to high strain-rate deformations. ASB is usually considered as an instability resulting from thermal softening effects. We present a different viewpoint, based on experimental observations in which we id…
Mechanical properties of engineered tissues should ideally match those of the tissues that are replaced. Engineered skin (ES) is often orders of magnitude weaker than normal skin, which can lead to damage during application and improper function after engraftment. Hypothetically, application of strain during culture o…
Application of physical pressure to a ferromagnetic bisdiselenazolyl radical leads to a decrease in pi-stack slippage. Initially, this leads to an increase in the ferromagnetic ordering temperature T(C), which reaches a maximum of 21 K near 1 GPa. At higher pressures, as the pi-stacks become more nearly superimposed,…
We report the first use of a non-frustrated block terpolymer for the synthesis of highly ordered oxide nanocomposites containing multiple plies. The morphological behavior of 15 ISO-oxide nanocomposites was investigated spanning a large range of compositions along the ƒ(I)=ƒ(S) isopleth using aluminosilicate and niobi…
Highly monodispersed nanoparticles of a trivalent silver polydiguanide complex are synthesized by oxidation of the monovalent silver, followed by stabilization of the oxidized higher-valent metal through complexation with a polydiguanide ligand in a reverse microemulsion at room temperature. The synthesized nanopartic…
The performance of a series of perovskite oxides having the mutual chemical formula and structure La 0.75 Sr 0.25 Cr 0.5 X 0.5 O 3−δ (X = Co, Fe, Ti, Mn) as solid oxide fuel cell anode electrocatalysts depends on the nature of the substituent element X. The electrocatalytic activity for methane oxidation in a fuel cel…
The reaction mechanism and kinetics of the thermal decomposition of uranium dinitride/uranium sesquinitride to uranium mononitride under inert atmosphere at elevated temperature were studied. An increase in the lattice parameter of the UN(2)/alpha-U(2)N(3) phase was observed as the reaction temperature increased, corr…
Silanol synthesis: Divacant lacunary polyoxotungstate (nBu4N+)4[γ-SiW10O34(H2O)2] (I) is an efficient homogeneous catalyst for highly selective oxidation of organosilanes to silanols with 30–60 % aqueous H2O2. Various kinds of silanes 1 containing aryl, alkyl, alkenyl, alkynyl, and alkoxy groups are chemoselectively c…
We present new spreading-drop data obtained over four orders of time and apply our new analysis tool G-Dyna to demonstrate the specific range over which the various models of dynamic wetting would seem to apply for our experimental system. We follow the contact angle and radius dynamics of four liquids on the smooth s…
Symmetric n- and p-type field-effect transistors (FETs) have been fabricated on the same undoped single-walled carbon nanotube (SWCNT). The polarity of the FET is defined by controlled injection of electrons (n-type, via Sc electrodes) or holes (p-type, via Pd electrodes) into the SWCNT, instead of via chemically dopi…
Metamaterial (MM) absorber is a novel device to provide near-unity absorption to electromagnetic wave, which is especially important in the terahertz (THz) band. However, the principal physics of MM absorber is still far from being understood. In this work, a transmission line (TL) model for MM absorber was proposed,…
Different combinations of critical and subcritical heat treatments variously modify the initial as cast microstructure of high chromium white cast irons leading to secondary carbide precipitation of different extent and nature. Destabilisation (critical heat treatment) of austenite at 970°C for 2·5 h followed by annea…