Materials Literature
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Particle swarm optimization (PSO), which is a new robust stochastic evolutionary computational algorithm based on the movement and intelligence of swarms, is proposed to estimate parameters of the Bouc–Wen hysteresis model. The performance of the PSO method is compared with the more common genetic algorithms (GAs) in…
A three-tiered organization of ZnO nanobuilding blocks into hollow spherical conformations has been developed. This self-assembly approach demonstrates new capacities of template-assisted synthesis in the architecture of hollow structures as well as in the construction of structurally complex nanomaterials.
This article describes a facile l -cysteine-assisted solvothermal method in a mixed solution made of ethylenediamine (en) and distilled water for the large-scale synthesis of various PbS 1D and 3D novel nanostructures. By varying process parameters such as the molar ratio of Pb(OAc) 2 to l -cysteine (reactants), the v…
Many different processing techniques are currently being used to produce tissue regeneration devices from polyesters in the polylactide/polyglycolide family. While it is generally well recognized that processing techniques influence bulk mechanical and degradation properties of these materials, the effects on surface…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTNovel Thermoresponsive Polymers Having Biodegradable Phosphoester BackbonesYasuhiko Iwasaki, Chookaet Wachiralarpphaithoon, and Kazunari AkiyoshiView Author Information Department of Chemistry and Materials Engineering, Faculty of C…
We report the first full numerical analysis of polarization gratings (PGs), and study their most general properties and limits by using the finite-difference time-domain (FDTD) method. In this way, we avoid limiting assumptions on material properties or grating dimensions (e.g., no paraxial approximations) and provide…
A molecular description of protein-surface interactions could open new avenues in bionanotechnology and provide a deeper understanding of in vivo phase boundary biophysics. However, current experimental techniques can provide only inferential or incomplete information about the protein-surface interface. We present a…
The effect of surface oxygen vacancies on the adsorption and clustering of the Pt adatoms over the defective anatase TiO 2 (101) surface has been studied using density functional theory slab calculations. The surface oxygen vacancy site was found to be the most active site for a single Pt adatom with an adsorption ene…
Better characterization of binding sites in proteins and the ability to accurately predict their location and energetic properties are major challenges which, if addressed, would have many valuable practical applications. Unfortunately, reliable benchmark datasets of binding sites in proteins are still sorely lacking.…
A recent study has indicated that there exists a different class of glass, the strain glass, in the nontransforming composition regime of Ti-Ni alloys. However, the critical proof for a glass, the evidence for the nonergodicity in the glassy state, has been missing in this system. By a zero-field-cooling/field-cooling…
The study of energy harvesting in chain-like structures is important due to its relevance to a variety of interesting physical systems. Harvesting is understood as the combination of exciton transport through intra-band exciton relaxation (via scattering on phonon modes) and subsequent quenching by a trap. Previously,…
Shape memory polymer foams have significant potential in biomedical and aerospace applications, but their thermo-mechanical behavior under relevant deformation conditions is not well understood. In this paper we examine the thermo-mechanical behavior of epoxy shape memory polymer foams with an average relative density…
First principles calculations based on the density functional theory within the local spin density approximation plus U(LSDA+U)scheme, show rhombohedral Bi$_2$FeTiO$_6$ is a potential multiferroic in which the magnetism and ferroelectricity coexist . A ferromagnetic configuration with magnetic moment of 4 $μ_B$ per fo…
Peptidomimetic polymers consisting of poly-N-substituted glycine oligomers (polypeptoids) conjugated to biomimetic adhesive polypeptides were investigated as antifouling surface coatings. The polymers were immobilized onto TiO(2) surfaces via an anchoring peptide consisting of alternating residues of 3,4-dihydroxyphen…
Silver nanoplates with thicknesses of 50-70 nm and edge lengths ranging from 200 nm to 1 mum have been grown on semiconductor wafers at room temperature through a simple galvanic reaction between an aqueous solution of AgNO(3) and n-type GaAs. The as-grown Ag structures have chemically clean surfaces due to no surfact…
The magnetic properties of the one dimensional (1D) monatomic chain of Co reported in a previous experimental work are investigated by a classical Monte Carlo simulation based on the anisotropic Heisenberg model. In our simulation, the effect of the on-site uniaxial anisotropy, Ku, on each individual Co atom and the n…
This work investigates the magnetically driven ferroelectricity in orthorhombic manganites $R\mathrm{Mn}{\mathrm{O}}_{3}$ ($R=\mathrm{Gd}$, Dy, or Tb) from the point of view of the symmetry. The method adopted generalizes the one used to characterize the polar properties of displacive modulated structures to the case…
We report the observation of negative magnetoresistance in the ferromagnetic semiconductor ${\mathrm{Ga}}_{1\ensuremath{-}x}{\mathrm{Mn}}_{x}\mathrm{As}$, $x=0.05--0.08$, at low temperatures $(T<3\phantom{\rule{0.3em}{0ex}}\mathrm{K})$ and low magnetic fields $(0<B<20\phantom{\rule{0.3em}{0ex}}\mathrm{mT})$.…
The nitrogen vacancy (NV) center in diamond is promising as an electron spin qubit due to its long-lived coherence and optical addressability. The ground state is a spin triplet with two levels $({m}_{s}=\ifmmode\pm\else\textpm\fi{}1)$ degenerate at zero magnetic field. Polarization-selective microwave excitation is a…
In some cases water droplets can completely wet microstructured superhydrophobic surfaces. The dynamics of this rapid process is analyzed by ultrahigh-speed imaging. Depending on the scales of the microstructure, the wetting fronts propagate smoothly and circularly or-more interestingly-in a stepwise manner, leading t…