Materials Literature
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We report on the preparation of layer-by-layer (LbL) assemblies based on anionic hydrophobically modified polysaccharides and different polycations. We systematically investigate the influence of the effect of the hydrophobicity of the polysaccharide derivatives on the multilayer buildup. We provide clear evidence tha…
In this work, the microstructural coarsening induced by heat treatment at temperatures between 1450° and 1750°C, for different zirconia‐toughened alumina (ZTA) materials has been studied. In doing so, grain growth kinetics and fracture toughness have been documented and analyzed. Obtained results are discussed and rat…
Abstract Porous silicon (PSi) is a versatile material that possesses a wide range of morphologies. There are two main types of microstructures that are widely used and well studied: branchy mesoporous silicon with pore sizes from 10 nm to 50 nm and classical macroporous silicon with pore sizes from 500 nm to 20 µm. Mu…
Chemical nanopatterns down to 50 nm in feature size have been fabricated via nanoimprint lithography and used to simultaneously control azimuthal and polar orientation of liquid crystals (LCs). The polar orientation depends on the ratio of the homeotropic/planar surface potential areas, while the LC azimuthally orient…
The Al 2 O 3 –SiO 2 system has been reassessed using a solution model for mullite extending from sillimanite to a hypothetical state of alumina. The property of sillimanite, to be used to describe one of the end‐members, was extracted from an analysis of the T – P phase diagram for Al 2 SiO 5 polymorphs. It was possib…
A novel framework for the one-dimensional analysis of a thermoelectric module (TEM) in which controlled and uncontrolled sides rather than cold and hot sides of it are defined is introduced. Next, heat conduction in a TEM is considered within this framework. Then, the operating modes of a TEM (cooling, generation, etc…
Adsorption of cationic high molecular weight polyacrylamides (CPAM) (M(w) is about 800 kDa) with different fractions of cationic units tau = 0.09 and tau = 0.018 onto silica surface was studied over a wide range of pH (4-9) and KCl concentration (c(s) = 10(-3)-10(-1) M) by in-situ null ellipsometry. We discuss how the…
Y 2 O 3 ‐stabilized ZrO 2 (YSZ) and Gd‐doped CeO 2 (GDC) oxide impregnated Ni was investigated and developed as anodes of solid oxide fuel cells. Performance of the Ni anodes for the H 2 oxidation reaction was substantially enhanced after the impregnation of submicrometer (100–300 nm) YSZ and GDC oxide particles. Afte…
Magnetic alignment studies demonstrate that a fraction of acid purified single wall carbon nanotubes (SWNTs) exhibit both linear-orbital (diamagnetic and/or paramagnetic) and ferromagnetic (FM) anisotropies. The latter are unexpected, as prior studies have assumed that remaining FM impurities are encapsulated and play…
A low‐temperature (≤700°C) magnesiothermic reaction has been used for the first time to convert three‐dimensional (3‐D) silica‐based diatom microshells into nanocrystalline magnesia‐based replicas. Exposure of diatom microshells to Mg( g ) at only 650°–700°C resulted in the initial (direct) formation of MgO and Si nan…
The capability of the blast furnace slag to be vitrified was investigated by means of differential thermal analysis (DTA), scanning electron microscopy, and X‐ray diffraction (XRD) in samples prepared by melting without the addition of any other ingredients. Differential thermal analysis revealed the presence of two m…
Trapping the light fantastic-ally! Enhanced photocurrents are observed for hydrogen-bonded gold nanoparticle/CdS nanoparticle arrays associated with a gold electrode surface (see scheme) as a result of charge separation and controlled electron transfer at the electrode interface.
The capability to form robust SiC‐to‐SiC joints is needed to enable the fabrication of complex SiC‐based structures. In this work, molybdenum foils are used to develop a diffusion bond with SiC during a vacuum heat treatment at 1500°C for 10 h. The bond consists of a central region of Mo 2 C with Mo 5 Si 3 +carbon and…
Two new cyano-bridged heterobinuclear complexes, [Mn(II)(phen)2Cl][Fe(III)(bpb)(CN)2] x 0.5CH3CH2OH x 1.5H2O (1) and [Mn(II)(phen)2Cl][Cr(III)(bpb)(CN)2] x 2H2O (2) [phen = 1,10-phenanthroline; bpb(2-) = 1,2-bis(pyridine-2-carboxamido)benzenate], and four novel azido-bridged Mn(II) dimeric complexes, [Mn2(phen)4(mu(1,…
The structural and physicochemical properties of the manganese-corrolazine (Cz) complexes (TBP8Cz)Mn(V)O (1) and (TBP8Cz)Mn(III) (2) (TBP = p-tert-butylphenyl) have been determined. Recrystallization of 2 from toluene/MeOH resulted in the crystal structure of (TBP8Cz)Mn(III)(CH3OH) (2 x MeOH). The packing diagram of 2…
Uniaxially aligned CoFe2O4 nanorods (see Figure) are obtained by coprecipitation of Co2+, Fe2+, and C2O42– ions in a microemulsion solution, and subsequent high-temperature decomposition of CoFe2(C2O4)3. Each nanorod is made up of a “tectonic” assembly of CoFe2O4 nanocrystals. Magnetization of such CoFe2O4 materials m…
The processing and characterization of electrical properties of potassium niobate ceramic, KNbO 3 (KN) have been studied. The difficulty of obtaining dense samples by conventional methods limits the knowledge on electrical properties of this material. In this paper, a complete route for processing of KN with density o…
For the first time, polarized-light-emitting quantum-rod diodes have been successfully produced, using thin layers of quantum rods oriented by a rubbing technique. Diode emission at 620 nm with a luminance efficiency of 0.65 Cd A–1 and an external quantum efficiency of 0.49 % is obtained (see Figure and inside cover).
nanocrystals coated with stearate groups are successfully converted to dendron-coated nanocrystals (dendron-nanocrystals). Poly(ethylene glycol) oligomers are used as major terminal groups for the dendron ligands, which afford excellent dispersibility of the dendron-nanocrystals in a broad spectrum of solvents, rangin…
Blue, green, and red polymerizable light-emitting liquid crystals have been patterned photolithographically in a full-color liquid-crystal electroluminescent display. A new hole-transporting photoalignment copolymer is also reported and the spatial patterning of the polarization direction of emission is demonstrated.