Materials Literature
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This report demonstrates a synthetic route for ordering a set of Au nanoparticles on the vertically aligned conducting polymer (polypyrrole) for the superhydrophobic surfaces with low water flow friction. It demonstrates how one can use polymer nanorod pillars and a variety of Au nanoparticles to generate controlled s…
A model is presented that describes nonstationary solidification of binary melts or solutions from a cooled boundary maintained at a time-dependent temperature. Heat and mass transfer processes are described on the basis of the principles of a mushy layer, which divides pure solid material and a liquid phase. Nonlinea…
Bulk Cu 2 O or cuprite is the only stable copper(I) compound present in plentiful amount in earth's crust. It is a challenging job to take bulk Cu 2 O to a nanoregime and to stabilize it in solution. No wonder that Cu 2 O in its nanoregime would act as a photocatalyst. We report a new synthetic protocol for the first…
The relationship between the crystal structures, band structures, and electronic properties of acene-TCNQ complexes has been investigated. We focus on the newly synthesized crystals of the charge-transfer salt tetracene-TCNQ and similar to it perylene-TCNQ, potentially interesting for realization of ambipolar transpor…
The cell wall in Gram-negative bacteria is surrounded by an outer membrane comprised of charged lipopolysaccharide (LPS) molecules that prevent entry of hydrophobic agents into the cell and protect the bacterium from many antibiotics. The hydrophobic anchor of LPS is lipid A, the biosynthesis of which is essential for…
The functionalization of the internal surface of pure-silica MFI zeolite using aliphatic alcohols (1-butanol and 1-hexanol) is reported. Calcined MFI nanoparticles (50, 100, 200, and 500 nm in size) are treated with neat 1-butanol and 1-hexanol under reflux conditions. The 1-butanol loadings on 200 and 500 nm particle…
Large-scale highly oriented ZnO nanorod arrays were directly grown on zinc foil through a simple hydrothermal reaction of Zn foil with aqueous ammonia at 100 °C. The products were characterized with X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. It was found that the ZnO nanorod…
Abstract The dielectric constant, dielectric loss factor, and alternating‐current conductivity of Gd‐doped poly(vinyl alcohol) (PVA) samples have been studied in the temperature and frequency ranges of 290–450 K and 50–5 × 10 6 Hz, respectively. Three relaxation processes—α a , α c , and ρ—have been obtained. The firs…
Nanocomposites built by intercalation of negatively charged Ni hydroxy citrate species [Ni(C 6 O 7 H 3 ) x (OH)] y y (3 x −1)− and NiCl 4 2− guest entities in the interlayer space of host Mg/Al layered double hydroxides (LDHs) have been obtained by anionic exchange. The sizes of the Ni particles in the Ni/Mg(Al)O samp…
Abstract VO x , CrO x and MnO x supported on TiO 2 are all efficient catalysts in the total oxidation of benzene. However, in the oxidation of chlorobenzene, they exhibit different behaviors in terms of their resistance to deactivation by the chlorinated reactant and/or products of the reaction (Cl 2 , HCl). Precisely…
Spinning strands: A hydrogel fiber made entirely of DNA without any covalent cross-links, composed of intertwined toroid entanglements of flexible DNA strands (see scheme), was prepared by a one-step wet-spinning method with a hydrophilic ionic liquid as the condensing agent and coagulation solvent. The internal struc…
Here we reveal that enzyme specific activity can be increased substantially by changing the protein loading density (P(LD)) in functionalized nanoporous supports so that the enzyme immobilization efficiency (I(e), defined as the ratio of the specific activity of the immobilized enzyme to the specific activity of the f…
The aging of a charged colloidal system has been studied by small-angle x-ray scattering, in the exchanged momentum range Q=0.03-5 nm(-1) , and by dynamic light scattering, at different clay concentrations (C(w)=0.6-2.8%) . The static structure factor S(Q) has been determined as a function of both aging time and conce…
In this study, we have investigated the photochemical properties and photodynamic effects of ruthenium phthalocyanine (RuPc(CO)(Py)) and naphthalocyanine (RuNc(CO)(Py)) complexes. When a nanosecond-pulsed laser is used, the photodecarbonylation of our Ru complexes efficiently proceeds via stepwise two-photon excitatio…
High-frequency electron paramagnetic resonance (HFEPR) data are presented for four closely related tetranuclear Ni(II) complexes, [Ni(hmp)(MeOH)Cl]4.H2O (1a), [Ni(hmp)(MeOH)Br]4.H2O (1b), [Ni(hmp)(EtOH)Cl]4.H2O (2), and [Ni(hmp)(dmb)Cl]4 (3) (where hmp(-) is the anion of 2-hydroxymethylpyridine and dmb is 3,3'-dimethy…
Filme eines Zn-Al-Hydroxids mit Schichtstruktur und intercaliertem Laurat (ZnAl-LDH-Laurat) sind durch Anionenaustausch mit ZnAl-LDH-Nitrat-Filmen auf einem porösen Substrat aus anodisiertem Aluminium zugänglich. Hierarchische Mikro- und Nanostrukturen (siehe SEM-Bild) machen die Filme superhydrophob und korrosionsbes…
Abstract The Maillard reaction between chitosan and hemicellulose model compounds such as mannose, xylose, and glucuronic acid was investigated. Chitosan and the compounds were dissolved in 1% acetic acid and were dried at 50°C. In an analysis of the film obtained, weight increase, color difference, FTIR, relative amo…
The Heusler alloy Ni50Mn37Sn13 was successfully produced as ribbon flakes of thickness around 7–10μm melt spinning. Fracture cross section micrographs in the ribbon show the formation of a microcrystalline columnarlike microstructure, with their longer axes perpendicular to the ribbon plane. Phase transition temperatu…
Compliance mismatch between the synthetic graft and the surrounding native tissue has been reported as a major factor in ultimate failure of the currently used cardiovascular graft replacements. Thus, developing biomaterials that display close mechanical properties as the tissue it is replacing is an important objecti…
Micro- to nano-sized GaOOH nanorods and particles were prepared under varying hydrothermal conditions without any surfactant and additive using gallium nitrate and sodium hydroxide as starting materials. The combination of X-ray diffraction (XRD), transmission electron microscopy (TEM), small area electron diffraction…