Materials Literature
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Changes in chemical properties of nanoscale particles include quantum size effect, changes in the cell parameters and lattice symmetry, and surface and interface effects. In the case of layered double hydroxides (LDHs), surface and interface effects dominate for nanoparticles of MgAl LDHs. Using TEM micrographs of nan…
We have investigated the effect of nanometric grain size on magneto- and electronic-transport properties of single-phase, nanocrystalline, granular ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}\mathrm{Mn}{\mathrm{O}}_{3}$ samples having an average grain size in the nanometric regime $(14--27\phantom{\rule{0.3em}{0ex}}\mathr…
We have studied the morphology of blends of PS/PMMA, PC/SAN24, and PMMA/EVA and compared the morphologies with and without modified organoclay Cloisite 20A or Cloisite 6A clays. In each case we found a large reduction in domains size and the localization of the clay platelets along the interfaces of the components. Th…
Several approaches are proposed to enhance the spin splitting at the conduction band edge and consequently induce free-electron-mediated stabilization of ferromagnetic semiconductors. We show that kinetic $s\text{\ensuremath{-}}d$ coupling can be introduced through chemical ordering and/or strain. We find that quantum…
In this study, we report on the lipid tail molecular shape/size effect on the mesophase self-assembly behaviors of various cationic lipids complexed with double-stranded DNA. The molecular shape of the cationic lipids was tailored from rodlike (a cyanobiphenyl imidazolium salt) to discotic (a triphenylene imidazolium…
The influence of a Nb 2 O 5 additive on the densification, microstructural morphology, and nonlinear electrical properties of the CuO‐doped SnO 2 ‐based varistors was investigated. It was found that copper oxide significantly improves the densification of the SnO 2 ceramics. The effects of Nb 2 O 5 on tin dioxide vari…
Barium titanate (BaTiO 3 ) base‐metal electrode multilayer ceramic capacitors of an X7R‐formulation, sintered at 1200°C under low oxygen partial pressures (of p O 2 ≈10 −9 and 10 −11 atm, respectively), followed by annealing at 1000°C in an atmosphere containing a higher oxygen partial pressure (of p O 2 ≈10 −5 –10 −6…
Conversion electron M\"ossbauer spectroscopy (CEMS) and superconducting quantum interference device (SQUID) magnetometry have been applied to study the metastable iron monosilicide phase $(\mathrm{c}\text{\ensuremath{-}}\mathrm{FeSi})$ with the B2 (or $\mathrm{CsCl}$) lattice structure synthesized by molecular beam ep…
We have adopted the transient-current technique as a sensitive method to detect small concentrations of charged defects in diamond and to study its photoionization spectrum. It is found that ionized impurity concentrations in the interval ${10}^{9}--{10}^{13}\phantom{\rule{0.3em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$…
The clinical application of holmium-loaded poly(L-lactic acid) (PLLA) microspheres for the radionuclide treatment of liver malignancies requires in depth understanding of the degradation characteristics of the microspheres. To this end, an in-vitro degradation study was conducted. PLLA-microspheres with and without Ho…
The use of high-melting fibres as linear nuclei for quiescent polymeric melts is instrumental in providing the superior mechanical properties of polymeric self-composites. It also has inherent advantages in the elucidation of fundamental aspects of polymeric crystallization and self-organization, not least in allowing…
The syntheses and metal complexes of 1,2,4,5-tetrakis(8-quinolyloxymethyl)benzene 1 and hexakis(8-quinolyloxymethyl)benzene 2 are described. X-Ray crystal structures are reported of the free ligand 1, a binuclear silver(i) and a tetranuclear copper(i) complex of 1, as well as a binuclear cobalt(ii) and trinuclear pall…
We present the study of selective adsorption and alignment behaviors of double- and multiwalled carbon nanotubes (dwCNTs and mwCNTs) on self-assembled monolayer (SAM) patterns, bare Au, and SiO2 surfaces. dwCNTs and mwCNTs exhibited stronger affinity to polar SAMs, bare Au, and SiO2 surfaces than to nonpolar SAM surfa…
In a previous study, the authors showed that iron(III) [tetrakis(pentafluorophenyl)]porphyrin chloride [(F20TPP)FeCl] is catalytically inactive for cyclooctene epoxidation by hydrogen peroxide in acetonitrile but is catalytically active if the solvent contains methanol. It was suggested that the precursor to the activ…
Unimolecular decay rates and monomer-dimer branching ratios of gold clusters ${{\mathrm{Au}}_{N}}^{+}$ $(N=7--27)$ have been measured as a function of excitation energy in photodissociation experiments on size-selected clusters stored in a Penning trap. Part of the data set has previously been used to extract model-fr…
Tubular balls: Self-assembly of an Au nanocluster with bionanotubes of bacteriophage T4 gene product 5 (gp5) trimers has been demonstrated (see picture). The triad of His6 fragments at the C terminus of (gp5–His6)3 contributed to the construction of an ordered tetrapod-like bionanotube assembly and the formation of Au…
Abstract A new conducting copolymer, polyacrylonitrile‐ graft ‐polyaniline (PAN‐ g ‐PANi), has been prepared by chemical and electrochemical methods from a precursor polymer. Poly[acrylonitrile‐ co ‐(acrylimine phenylenediamine)] (PAN‐ co ‐PAIPD) was synthesized chemically by reacting PAN with sodium 1,4‐phenylenediam…
We test classical nucleation theory (CNT) in the case of simulations of deeply supercooled, high density liquid silica, as modeled by the van Beest-Kramer-van Santen potential. We find that at density rho=4.38 gcm(3), spontaneous nucleation of crystalline stishovite occurs in conventional molecular dynamics simulation…
Phase‐pure lanthanum stannate (La 2 Sn 2 O 7 ) nanoparticles with a pyrochlore structure were produced by a simple coprecipitation method for the first time. The optical properties of La 2 Sn 2 O 7 synthesized by different conditions were investigated. They had different photoluminescence intensities around 400 nm at…
In this paper stable, low-resistance contacts on porous silicon have been realized by electroless nickel deposition from a very weakly alkaline solution followed by copper thickening. The porous silicon layer after nickel deposition has been analysed by x-ray diffraction, which shows that a porous silicon nickel struc…