Materials Literature
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The pH-amplified exponential growth layer-by-layer (LBL) self-assembly process was directly performed on honeycomb-patterned substrate for achievement of "guided patterning" of polyelectrolyte multilayers. Polyethylenimine (PEI) and poly(acrylic acid) (PAA) were used as polyanions, and their pH were carefully tuned to…
Composite right/left-handed (CRLH) unit cells can be used to develop new distributed circuits with novel functionalities. In particular, their use in distributed amplifiers leads to an improvement in their power performance. An analysis of the intrinsic power performance of distributed amplifiers based on CRLH unit ce…
In this paper, we have examined the activity and selectivity of catalysts for the one-step, gas phase production of methyl isobutyl ketone (MIBK) from acetone (propanone) over the temperature range 373−573 K. The catalysts used were an impregnated MgO/silica, a Pd-MgO/silica formed from coimpregnation of the nitrates,…
We have re-examined the crystal structure and the physical properties of VOSe 2 O 5 by performing single crystal X-ray and powder neutron diffraction, alternating current (AC) and direct current (DC) magnetization measurements, heat capacity, dielectric properties, and second-harmonic generation (SHG) measurements. Fr…
We extend a previously published compressible lattice model to the prediction of glass-transition temperatures in CO 2 + polymer systems. We have applied the model to published data as well as to new measurements of glass-transition temperatures in CO 2 + poly(methyl methacrylate) (PMMA) and CO 2 + poly(lactic acid) (…
The study of interactions between oppositely multicharged (macro)molecules remains a challenging issue. In frontal analysis capillary electrophoresis (FACE), it is difficult to avoid the adsorption of one of the interacting partners onto the capillary wall. In this work, we demonstrate the possibility to use FACE and…
We have studied how the hysteretic voltage-induced torsional strain, associated with charge-density-wave (CDW) depinning, in orthorhombic tantalum trisulfide depends on square-wave and triangle-wave voltages of different frequencies and amplitudes. The strains are measured by placing the sample, with a wire glued to t…
Abstract Highly porous zirconia with defined particle morphology can be prepared by impregnation of spherical activated carbon as an exotemplate with a zirconia nanoparticle sol. The resulting zirconia spheres show a particle size distribution between 0.2 and 0.4 mm and exhibit high specific surface areas and specific…
The first approach towards the automatic layout generation of resonant-type metamaterial transmission lines by using space mapping optimisation is reported. Specifically, the so-called aggressive space mapping (ASM) technique is applied for synthesising microstrip lines loaded with complementary split ring resonators…
This study presents a design of n-bit phase shifters inspired by the composite right/left-handed transmission line (CRLH TL) unit cells. The phase shifters designed have the advantages of small size, high power-handling capability, low insertion loss, arbitrary phase-shift range and arbitrary step size. PIN diodes mou…
The title compound, also called CLT acid, is an industrial intermediate in the synthesis of laked red azo pigments for newspaper printing. Solid-state NMR and IR experiments revealed the compound to exist as the zwitterionic tautomer in the solid state. The crystal structure was solved from X-ray powder diffraction da…
A silicone resin with silphenylene units in Si—O—Si backbones was prepared through hydrolysis-polycondensation of self-synthesized 1,4-bis(diethoxymethylsilyl)benzene (BDSB) and other alkoxysilanes. The structure and properties of this novel silicone resin were characterized by gel permeation chromatography (GPC), Fou…
We report on the existence of monoclinic ( M B ), orthohombic ( O ), and rhombohedral ( R ) phases in [101]‐oriented 74Pb(Mg 1/3 Nb 2/3 )O 3 –26PbTiO 3 (PMN–26PT) single crystals under electric loadings. Before electric loadings, the [101]‐oriented PMN–26PT single crystal is composed of R and monoclinic phases. Both M…
Abstract The chiral cyclic triphosphazenes ( R )‐(–)‐[N 3 P 3 (O 2 C 20 H 12 )(O 2 C 12 H 8 )Cl 2 ] ( I ) and ( R , R )‐(–) [N 3 P 3 (O 2 C 20 H 12 ) 2 (O 2 C 12 H 8 )] ( II ), prepared by sequential substitution of [N 3 P 3 Cl 6 ] using ( R )‐2,2′‐dihydroxy‐1,1′‐binaphthyl, 2,2′‐dihydroxy‐1,1′‐biphenyl and Cs 2 CO 3…
A design procedure is presented for synthesising artificial transmission lines (metamaterial lines) that exhibit four alternating backward (left-handed) and forward (right-handed) bands. Specifically, analytic expressions are given that directly yield the loading lumped elements needed for synthesising a desired Bloch…
Single-walled carbon nanotubes substitutionally doped with the light-element phosphorus are synthesized and are investigated by electrical and nuclear magnetic resonance measurements. Decreased spin-lattice relaxation times compared to undoped tubes point toward enhanced spin-sensitive scattering. Temperature dependen…
The Debye function was used to simulate the X-ray powder diffraction patterns from loose-packed systems of nanocrystals. The resulting patterns contain local atomic lattice information in the wide-angle region as well as long range, inter-particle structure features in the small-angle region. Both monodisperse and pol…
Präzisionsarbeit: Ein einfaches, einstufiges Polyolverfahren ermöglicht die Synthese von monodispersen, einkristallinen Au-Cu-Dimetallnanowürfeln. Durch Feinjustierung der Reaktionsparameter lassen sich die Dimensionen der Nanowürfel (zwei Beispiele mit 23 und 5 nm sind gezeigt) ebenso einstellen wie ihre Gold- und Ku…
The quantum sieving effect of D(2) over H(2) is examined at 40 and 77 K by means of experiments and GCMC simulations, for two types of single-wall carbon nanotubes that are distinguishable by their unique entangled structures; (1) a well-bundled SWCNT and (2) loosely-assembled SWCNT produced by the super growth method…
Entropically driven ring-opening copolymerization of mixtures of a fraction of cyclic oligo(hexamethylene terephthalate)s composed of cycle sizes from 2 to 5 and p-dioxanone was used to prepare random copolyesters covering a range of aromatic (HT) to aliphatic (DO) units ratios from 9 to 1.3. The composition and micro…