Materials Literature
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Spin and charge ordered states with domain walls (DW) in two- and three-dimensional perovskite-type $3d$ transition-metal oxides have been investigated. We show that the relative stability of the DW perpendicular to the $(1,0,0)$, $(1,1,0)$, and $(1,1,1)$ directions in three dimensions and those along the $(1,0)$ and…
Mode-coupling theory applied to a classical ionic fluid predicts a new glassy phase at low densities due to long-range Coulomb interactions besides the high-density glass resulting from geometrical restrictions imposed by hard-core repulsions. The fluid-glass phase boundary exhibits a power law ${\ensuremath{\eta}}_{c…
Surface freezing in hydrated alcohol melts was studied by surface tension and x-ray methods. An $\ensuremath{\sim}2.5\AA{}$ swelling of the surface-frozen bilayer is observed at saturated humidity, due to water intercalation into the bilayer. The concomitant upshifts of 2.5 and 3--6 \ifmmode^\circ\else\textdegree\fi{}…
We report a molecular dynamics simulation study of the sound waves in vitreous silica in the mesoscopic exchanged momentum range. The calculated dynamic structure factors are in quantitative agreement with recent experimental inelastic neutron and x-ray scattering data. Analysis of the longitudinal and transverse curr…
We have studied the spin dynamics in ${\mathrm{Pr}}_{0.63}{\mathrm{Sr}}_{0.37}{\mathrm{MnO}}_{3}$ above and below the Curie temperature ${T}_{C}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}301$ K. Three distinct new features have been observed: a softening of the magnon dispersion at the zone boundary for $T<…
We report very highly resolved photoemission spectra of ${\mathrm{NiS}}_{1\ensuremath{-}x}{\mathrm{Se}}_{x}$ across the so-called metal-insulator transition as a function of temperature as well as composition. The present results convincingly demonstrate that the low temperature, antiferromagnetic phase is metallic, w…
The binding, internalization, subcellular trafficking and in vitro cytotoxicity of N-(2-hydroxypropyl)methacrylamide (HPMA) copolymer-anti-cancer drug-OV-TL16 antibody (Ab) conjugates in the ovarian carcinoma OVCAR-3 cell line have been investigated. Adriamycin (ADR) and meso chlorin e6 mono(N-2-aminoethylamide) (Mce6…
In this study we have synthesized ZnO:EuCl3 phosphors under various sintering atmospheres and temperatures, and investigated the effect of coupling structure of Eu in ZnO upon the photoluminescent characteristics for the purpose of searching for optimum conditions towards pure red emission. The analysis of x-ray diffr…
Nanocrystalline silicon (nc-Si) was fabricated by KrF excimer laser annealing of hydrogenated amorphous silicon/amorphous-SiNx:H superlattices. A stable and reproducible electroluminescence (EL) based on these structures was observed at room temperature. It was found that the EL peak was significantly blueshifted from…
The strong dependence of the intensity of single bubble sonoluminescence (SBSL) on water temperature observed in experiment can be accounted for by the temperature dependence of the material constants of water, most essentially of the viscosity, of the argon solubility in water, and of the vapor pressure. The strong i…
A highly specific and effective magnetic resonance imaging (MRI) contrast agent was prepared by coating super-paramagnetite particles with monoclonal antibodies (MAbs) directed against epidermal growth factor receptors (EGFRs), which are over-expressed in esophageal squamous cell carcinoma. The preparation maintained…
Intraband spectra of CdSe nanocrystal colloids are observed. The photoexcited nanocrystals, of average diameters 31.5, 38, and 43 Å, exhibit an isolated and strong infrared-induced absorption with peak energy between 0.5 and 0.3 eV. The energies and cross sections of the resonance are consistent with a one-electron tr…
Susceptibility and high field magnetization measurements have been performed on powdered samples of $[{\mathrm{Ni}(333\ensuremath{-}\mathrm{tet})(\ensuremath{\mu}\ensuremath{-}{\mathrm{N}}_{3}){}}_{n}]({\mathrm{ClO}}_{4}{)}_{n}$ [333-tet denotes tetraamine ${N,N}^{\ensuremath{'}}$-bis(3-aminopropyl)-1,3-propanediamine…
Experimental and theoretical investigations of intermetallic semi-Heusler compounds (CoTiSn, FeTiSb, CoTiSb, NiTiSn, CoNbSn, CoVSb, NiTiSb) and their solid solutions are presented. The physical properties of these systems are found to be mostly determined by the number of valence electrons. Resistivity experiments sho…
The magnetoresistance behavior of Fe3O4 in polycrystalline thin film, powder compact, and single-crystal form are compared. Negative magnetoresistance with peaks at the coercive field, observed in thin films and powder compacts but not in the single crystal, is due to field-induced alignment of the magnetization of co…
The stability of a nematic phase in binary mixtures of liquid crystals (LC) with non-nematogenic solvents, was analyzed using the combined Flory–Huggins and Maier–Saupe models. Stability was described using general criteria developed by Dorgan [Liq. Crys. 10, 347 (1991)], applied to the g(φ1,s) function describing the…
The surface plasmon enhancement effect on adsorbed molecules at elevated substrate temperatures is studied theoretically using surface enhanced Raman scattering (SERS) as an example. The surface structure is idealized to be a monodisperse spherical particle with its nonlocal dielectric response accounted for. The temp…
Asymmetric patterns of streaming around a single sonoluminescent bubble have been observed by Lepoint-Mullie and co-workers. The present paper considers theoretically the viscous streaming from a spherical bubble undergoing small radial and lateral oscillations simultaneously, using an extension of the method of David…
In this article, the synthesis and properties of the (ethylene-vinyl acetate-vinyl alcohol) terpolymer are studied in detail. A transesterification reaction with alcohols was conducted on poly(ethylene-vinyl acetate) to obtain terpolymers with varying hydroxide contents through three different routes: in solution, in…
The synthesis of low-molecular-weight (Mw (GPC) < 72000 g mol) lactic-acid-based telechelic prepolymers by condensation polymerization of L-lactic acid was investigated. All polymerizations were carried out in the melt, using tin(II)octoate as catalyst, different diols, and different polymerization temperatures. The p…