Materials Literature
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A new compound, Ti 5 Al 2 C 3 , is identified in the bulk sample prepared by reactive hot pressing a mixture of Ti , Al and graphite powders with a nominal molar ratio of Ti : Al : C = 5:2.15:2.78 at 1580°C for 1 h. This compound follows the crystal structure of other MAX phases. The lattice parameters are a = 0.3038…
Advanced joining approaches are critically needed for the fabrication and integration of silicon carbide‐based micro‐electro‐mechanical systems lean direct fuel injectors for jet engines. Diffusion bonding of silicon carbide with titanium interlayers offers advantages such as uniform application/surface coverage and n…
We present a joint theoretical-experimental study on electron scattering by methanol (CH(3)OH) and ethanol (C(2)H(5)OH) in a wide energy range. Experimental differential, integral and momentum-transfer cross sections for elastic electron scattering by ethanol are reported in the 100-1000 eV energy range. The experimen…
We present a self-consistent field theory (SCFT) formalism of topologically unconstrained ring polymers for the first time. The resulting static properties of homogeneous and inhomogeneous ring polymers are compared with the random phase approximation (RPA) results. For ring homopolymer mixture, as χ N increases, the…
Eliminating the electromagnetic interaction of a device with its background is a topic which attracts considerable attention both from a theoretical as well as from an experimental point of view. In this work, we analyze an infinite two‐dimensional planar microstrip antenna, excited by an incident plane wave, and prop…
Linear polymers with hyperbranched side chains are unusual macromolecular structures due to their high number of functional groups in the side chains as well as their potential cylindrical conformation in bulk or solution. In a three-step synthesis combining anionic and oxy-anionic polymerization, hyperbranched polygl…
Abstract Friction-induced hillocks can be produced on monocrystalline silicon by scratching under given conditions. Results show that the height of these hillocks increases with the applied normal load or number of scratching cycles, but decreases with the sliding velocity. Transmission electron microscope (TEM) and e…
A light-responsive brush was obtained by surface-initiated ATRP of a methacrylate monomer containing ionizable −COOH side groups caged with the photoremovable group 4,5-dimethoxy-2-nitrobenzyl (NVOC). In the caged form, the polymer brush (PNVOCMA) is neutral and hydrophobic due to the presence of the aromatic chromoph…
While silk-based microfibrous scaffolds possess excellent mechanical properties and have been used for ligament tissue-engineering applications, the microenvironment in these scaffolds is not biomimetic. We hypothesized that coating a hybrid silk scaffold with an extracellular matrix (ECM)-like network of self-assembl…
Artificial muscles powered by a renewable energy source are desired for joint articulation in bio-inspired autonomous systems. In this study, a robotic underwater vehicle, inspired by jellyfish, was designed to be actuated by a chemical fuel source. The fuel-powered muscles presented in this work comprise nano-platinu…
In this study, silver nanoparticles were synthesized using the fungus, Aspergillus flavus at high yield with an aqueous solution of AgNo3. The formation of silver nanoparticles was confirmed using UV-visible spectrophotometer and their presence was displayed by XRD studies. The size and place formation of silver nanop…
Abstract In the last years, some high renewable content epoxy resins, derived from vegetable oils, have been developed at industrial level and are now commercially available; these can compete with petroleum‐based resins as thermoset matrices for composite materials. Nevertheless, due to the relatively high cost in co…
The coupling effects of subwavelength high-permittivity ( ε r > 100) arrayed ceramics which exhibit magnetic and electric Mie resonances are investigated by electromagnetic full-wave analysis. Special attention was paid to the symmetry properties of both magnetic- and electric-induced dipoles by varying independently…
SBA-15 mesoporous silica was modified using (3-aminopropyl)trimethoxysilane (APTMS) following co-condensation or grafting methods and then used as a NO(2) adsorbent at room temperature. The samples were characterized before and after exposure to NO(2) by SEM-EDX, N(2) adsorption at 77 K, potentiometric titration, ther…
Abstract The influence of the thermal conductivity of the regenerator solid on the performance of a flat plate active magnetic regenerator (AMR) is investigated using an established numerical AMR model. The cooling power at different (fixed) temperature spans is used as a measure of the performance for a range of ther…
A dinuclear cobalt complex with cobalt centers bridged by a bis(dioxolene) ligand exhibits a rare two-step valence tautomeric transition.
Competition between the invariant plane (IP) condition at the habit plane, the twin orientation relation (OR) and the kinematic compatibility (KC) at the junction plane (JP) of self-accommodated B19′ martensite in Ti–Ni was investigated via the geometrically nonlinear theory to understand the habit plane variant (HPV)…
A detailed theoretical study of structural, elastic and electronic properties of tI26-type Mg12RE (RE = Ce, Pr and Nd) phases has been carried out by means of first-principles calculations based on density functional theory. The optimized lattice parameters at T = 0 K are in excellent agreement with the available expe…
Novel multicolor and photoswitchcable fluorescent polymer nanoparticles were prepared by one-step miniemulsion via methyl methacrylate (MMA) copolymerization with 4-ethoxy-9-allyl-1,8-naphthalimide (EANI), allyl-(7-nitro-benzo[1,2,5]oxadiazol-4-yl)-amine (NBDAA) and spiropyran-linked methacrylate (SPMA). Under visible…
BACKGROUND: Most studies on biodegradable magnesium implants published recently use magnesium-calcium-alloys or magnesium-aluminum-rare earth-alloys.However, since rare earths are a mixture of elements and their toxicity is unclear, a reduced content of rare earths is favorable. The present study assesses the in vivo…