Materials Literature
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A monolayer of a phosphonated triarylamine adsorbed on nanocrystalline TiO2, ZrO2, or Al2O3 film deposited on conducting glass displays reversible electrochemical and electrochromic behavior although the redox potential of the electroactive molecules (0.80 V vs NHE) lies in the forbidden band of the semiconducting or…
The steric environment of alkanethiolate ligand shells of monolayer-protected gold cluster (MPCs) molecules has been investigated in three ways. First, the S N 2 reactivity of ω-bromoalkanethiolate-functionalized MPCs with primary amines has been shown to respond to the steric bulk of the incoming nucleophile (rates o…
The organic chemistry has three types of one-pot multicomponent reactions (MCRs). These do not proceed directly but stepwise by reactions of two participating chemical compounds. All components of the MCRs of type I equilibrate, whereas in MCRs of type II most of the participating components equilibrate, but at least…
has been studied by means of Mössbauer spectroscopy and x-ray diffraction. The crystal is found to have a cubic spinel structure with the lattice constant . The iron ions are in ferric states. The temperature dependences of the magnetic hyperfine fields at the nuclei at the tetrahedral (A) and octahedral (B) sites are…
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…