Materials Literature
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Abstract Construction of artificial metalloenzymes based on protein assemblies is a promising strategy for the development of new catalysts, because the three‐dimensional nanostructures of proteins with defined individual sizes can be used as molecular platforms that allow the arrangement of catalytic active centers o…
Abstract HZSM‐5 zeolites modified with various alkaline earth oxides (MgO, CaO, and BaO) were prepared by using impregnation and mixed physically with Cu/ZnO/Al 2 O 3 to perform the direct synthesis of dimethyl ether (DME) from syngas in a pressurized fixed‐bed under continuous flow conditions. The results indicated t…
Abstract A biomimetic sensor containing the oxo‐bridged dinuclear manganese‐phenanthroline complex incorporated into a cation‐exchange polymeric film deposited onto glassy carbon electrode for detection of sulfite was studied. Cyclic voltammetry at the modified electrode in universal buffer showed a two electron oxida…
The nickel hydride complex [Cp'Ni(μ-H)]2 (1, Cp' = 1,2,3,4-tetraisopropylcyclopentadienyl) is found to have a strikingly short Ni-Ni distance of 2.28638(3) Å. Variable temperature and field magnetic measurements indicate an unexpected triplet ground state for 1 with a large zero-field splitting of +90 K (63 cm(-1)). E…
The cusp-like temperature dependence of the Debye-Waller factor or non-ergodicity parameter f(Q)(T) at some temperature T(c) above T(g) found by experiments in several fragile glassformers has been considered as critical evidence for validity of the ideal Mode Coupling Theory (MCT). A comprehensive review of experimen…
A method was developed for aligning interference fringes generated in interference lithography to the vertical {111} planes of <110> oriented silicon wafers. The alignment error is 0.036°. This high precision method makes it possible to combine interference lithography with anisotropic wet etch technique for the fabri…
The uniform dispersion of carbon nanotubes in epoxy resin is one of the key factors to achieve the composites with desirable mechanical and physical property enforcement. However, the widely used dispersion methods have their own respective limitations in pursuing satisfactory nanotube dispersion. Herein, a new disper…
Metrical insights from X-ray scattering studies of dense fluid phases (known as "third" phases) in the Keggin heteropolyacid-tri-n-butyl phosphate (TBP)-n-alkane system are provided. Small-angle X-ray scattering (SAXS) experiments reveal inter-acid correlation peaks corresponding to average centre-of-mass to centre-of…
Lanthanide-containing nanoparticles have attracted much attention due to their unique optical properties and potential in nanotechnological applications. An amphiphilic block copolymer of poly(ethylene glycol)-b-poly(ε-caprolactone) methyl ether (mPEG-PCL) was functionalized with a dipicolinic acid (dpa) moiety and co…
Pretreatment of the sisal fiber (SF) grafting with L‐lactide (LA) monomer via a ring‐opening polymerization catalyzed by a Sn(II)‐based catalyst was performed to improve the interfacial adhesion between SF and poly (lactic acid) (PLA). Biocomposites from LA‐grafted SF (SF‐ g ‐LA) and PLA were prepared by compression m…
Accurate atomic displacement parameters (ADPs) are a good indication of high-quality diffraction data. Results from the newly commissioned time-of-flight Laue diffractometer TOPAZ at the SNS are presented. Excellent agreement is found between ADPs derived independently from the neutron and X-ray data emphasizing the h…
Abstract The PANI/Au 0 nanocomposite films were successfully prepared on glassy carbon electrode (GCE) using a simple alternate adsorption of water soluble polyaniline (PANI) and ${{\rm AuCl}{{- \hfill \atop 4\hfill}}}$ . The growth of the films was monitored by UVVis spectroscopy and cyclic voltammetry. ${{\rm AuCl}…
Polymer coatings are widely used to protect metals from corrosion. Coating adhesion to the base material is critical for good protection, but coatings may fail because of cathodic delamination. Most of the experimental studies on cathodic delamination use polymers to study the corrosion behavior under conditions where…
Layered hybrid materials (LHMs) based on ordered silicoaluminate sheets linked with organic fragments, perpendicularly located and stabilized in the interlayer space, were synthesized by a one-pot direct hydrothermal process in the absence of structural directing agents (SDAs) and using bridged silsesquioxanes as orga…
The effect of alloying elements on crack propagation behaviour was investigated using extruded Mg–Ca and Mg–Zn binary alloys, with and without {} type deformation twins (DT). These alloys had similar microstructures grain boundary (GB) structure, basal texture, and grain size of ~30 μm. Most of the cracks in the Mg–Ca…
The study includes the preparation of fiber-cement panels made from the husks of rice paper and old newspapers, which are used in the prefabricated building panels, and manufacturing of these panels using two types of polymers as materials. The flexural strength reaches 6.99 MP compared with imported panels of 3.5 MP;…
OBJECTIVE: In the present study, W/O microemulsions (MEs) were prepared for efficient removal of oily make-up cosmetics and the detergency characteristics were studied. METHODS: The W/O MEs were prepared by mixing of a spontaneous emulsifier, cosurfactant and oil, and solubilizing the mixture during addition of water.…
We announce and sketch the rigorous proof of a new kind of anomalous (or sub-ballistic) Lieb-Robinson (LR) bound for an isotropic $XY$ chain in a quasiperiodic transversal magnetic field. Instead of the usual effective light cone $|x|\ensuremath{\le}v|t|$, we obtain $|x|\ensuremath{\le}v|t{|}^{\ensuremath{\alpha}}$ fo…
Polypyrrole (PPy)/montmorillonite (MMT) nanocompounds were prepared by in situ chemical oxidative polymerization of pyrrole in the presence of MMT. The results indicate PPy is intercalated into MMT interlayers and the morphology of obtained PPy in nanocompounds is changed to flake‐like rather than granular particles a…
We study experimentally and theoretically the hydrodynamic interaction of pairs of circular inclusions in two-dimensional, fluid smectic membranes suspended in air. By analyzing their Brownian motion, we find that the radial mutual mobilities of identical inclusions are independent of their size but that the angular c…