Materials Literature
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Boronic acids, known to bind diols, were screened to identify non-inflammatory cross-linkers for the preparation of glucose sensitive and insulin releasing agglomerates of liposomes (Agglomerated Vesicle Technology-AVT). This was done in order to select a suitable replacement for the previously used cross-linker, Conc…
The low-frequency ($<80$ cm${}^{\ensuremath{-}1}$) optical modes appearing in the dielectric spectra at low temperature are determined across the morphotropic phase boundary of disordered $\mathrm{Pb}(\mathrm{Zr},\mathrm{Ti}){\mathrm{O}}_{3}$ solid solutions from the use of first-principles-based molecular dynamics…
Self-assembly from mixed dispersions of three sizes of monodisperse polystyrene nanoparticles, large (L), medium (M), and small (S), was controlled by coating each particle type with either a monofunctional or bifunctional polymer capable of participating in specific complexation reactions. The complexation reactions…
Although Fe-Pd alloy thin films are highly promising for magnetic shape memory actuation in biomedical applications and miniaturized devices, phase formation and thermodynamic properties are still poorly understood. In the present study we employ density-functional theory and ab initio molecular-dynamic simulations on…
High-molecular-weight un-cross-linked poly( p- xylylene) (PPX) derivatives ( 3 ) with one lateral linear alkyl substituent (methyl–octyl) on each phenylene moiety were prepared by pyrolysis of corresponding paracyclophanes followed by chemical vapor deposition (CVD). Most of these PPX derivatives showed good solubilit…
Electrically driven gallium movement in carbon nanotubes is discussed. A higher current (~15 mA) makes the gallium migrate sharply toward the anode, which increases its mass transport speed with time in the range of 0 to more than 10.345 fg s(-1). In contrast, a lower current (~2 mA) only drives gallium to contact the…
This article concerns the design of antireflection structures which, placed on a photonic crystal surface, significantly diminish the fraction of energy lost to reflected waves. After a review of the classes of these structures proposed to date, a new method is presented in detail for the design of antireflection grat…
We have fabricated Er doped germanium nanowires of different diameters by pulsed laser deposition and chemical methods. Er induced photoluminescence emission due to the intra-4f (4)I(13/2)→(4)I(15/2) transition of Er energy levels at 1.53 µm has been achieved at room temperature using both resonant (980 nm) and non-re…
Pressure-induced structural transformations in relaxor-based perovskite-type (ABO${}_{3}$) 0.9PbZn${}_{1/3}$Nb${}_{2/3}$O${}_{3}$-0.1PbTiO${}_{3}$ single crystals which have a very high piezoelectric response were studied by single-crystal x-ray diffraction and Raman spectroscopy at room temperature and pressures up t…
We demonstrate a one-step approach for selecting the number of walls formed during carbon nanotube (CNT) growth by catalytic decomposition of CH(4) over Fe-Mo/MgO catalysts. Scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), thermal gravimetric analysis (TGA) and Raman spectr…
Co-doped glass–ceramics containing spinel nanocrystals attach much attention as optical materials. The composition and preparation conditions of the material will influence its structure and optical properties. In this study, the samples (100– x )Co 0.1 Zn 0.9 Al 2 O 4 – x SiO 2 ( x = 0–95) were prepared by the sol–ge…
This study examines the composition of certain hydrates (calcium silicate, aluminum silicate, and related phases) produced by the pozzolanic reaction of waste‐paper sludge that had previously been activated at different temperatures. It summarizes and compares the evolution of the oxide compounds, and records their st…
Abstract In this article, blends of styrene butadiene rubber (SBR) and acrylonitrile butadiene rubber (NBR) filled with a mesoporous silica are characterized by using scanning electron microscopy (SEM), dynamic mechanical analysis, and differential scanning calorimetry. According to the variation of the glass transiti…
Monte Carlo computer simulations are carried out for a model system of like-charged colloidal platelets in the isothermal-isobaric ensemble (NpT). The aim is to elucidate the role of electrostatic interactions on the structure of synthetic clay systems at high particle densities. Short-range repulsions between particl…
Bioinspired synthesis approaches aim to take advantage of the morphology and structural features of biological materials for the development of functional micro/nanodevices. In this Letter, we report that a unicellular algae known as a Spirulina was applied as a bioscaffold for the synthesis of hollow metallic Cu micr…
The aim of this work was to study the effect of surface-modified calcium carbonate (CaCO 3 ) nanoparticles in the mechanical properties and crystallization behavior of polypropylene (PP) homopolymer. Pimelic acid (Pa) was used as a surface modifier for nano-CaCO 3 (nCC). Three compositions of PP/nCC composites were pr…
In Bacillus subtilis, the arabinose repressor AraR negatively controls the expression of genes in the metabolic pathway of arabinose-containing polysaccharides. The protein is composed of two domains of different phylogenetic origin and function: an N-terminal DNA-binding domain belonging to the GntR family and a C-te…
Oxidation characteristics of HfB 2 ‐15 vol% SiC prepared by field‐assisted sintering was examined at 2000°C by heating it in a zirconia‐resistance furnace and by direct electrical resistance heating of the sample. Limitations of the material and the direct electrical resistance heating apparatus were explored by heati…
Methods which disperse single-walled carbon nanotubes (SWNTs) in water as 'debundled', while maintaining their unique physical properties are highly useful. We present here a family of cationic cholesterol compounds (Chol+) {Cholest-5en-3β-oxyethyl pyridinium bromide (Chol-PB+), Cholest-5en-3β-oxyethyl N-methyl pyrrol…
The structural, energetic, electronic, and magnetic properties of a series of vanadium naphthalene (V(n-1)Np(n)) sandwich clusters (SWCs) and the VNp sandwich nanowire (SWN) were investigated by means of density functional theory computations. In the energetically most preferred configuration of each V(n-1)Np(n) SWC a…