Materials Literature
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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.
The time-differential perturbed-angular-correlation (TDPAC) technique was applied to the study of the internal electric-field gradient (EFG) in Eu- and Ho-sesquioxides in their cubic bixbyite phases. The results, as well as previous characterizations of the EFG at $^{181}$Ta sites in oxides with the bixbyite structure…
The novel bidentate ligand 1,4-di(1,2,3-triazol-1-yl)butane (bbtr) reacts with Fe(ClO4)2 x 6H2O to form the 2D coordination polymer with (3,6) network topology. The {[Fe(bbtr)3](ClO4)2}infinity represents an example of spin-crossover material based on 1,2,3-triazole as donor group, and displays an abrupt spin transiti…
Two commercial hot‐pressed boron carbide ceramics were investigated by transmission electron microscopy. Atomic‐scale observations suggest that the grain boundaries of the two materials are free of grain‐boundary films. Two triple‐junction phases were found and characterized to be rhombohedral Fe 2 B 103 and orthorhom…
Oriented aggregation-based self-assembly of hexagonal LaF3 nanodisks with cavities into plate-built cylinders proceeding in acidic solution in the absence of any organic additive was disclosed. The self-assembly consists of two steps. First, the nanodisks sequentially aggregated together by coalescence mainly through…
Homogeneous, nanocrystalline powders of yttria-stabilized zirconia (YSZ) were prepared using a non-alkoxide sol−gel method. Monolithic gels, free of precipitation, were prepared by addition of propylene oxide to aqueous solutions of Zr 4+ and Y 3+ chlorides at room temperature. The gels were dried with supercritical C…
It is necessary for encapsulants to have not only a suitable coefficient of thermal expansion (CTE) compatible to IC devices and a low dielectric constant to reduce the device propagation delay, but also a high thermal conductivity to dissipate large amounts of heat from power‐hungry, high‐speed IC and high‐density pa…
A series of quater-, quinque-, and sexithiophene derivatives bearing two cholesteryl groups at the alpha-position, which are abbreviated as 4 T-(chol)(2), 5 T-(chol)(2), and 6 T-(chol)(2), respectively, have been synthesized. It has been found that these oligothiophene derivatives act as excellent organogelators for v…
The concept of a feasible operating area for a solid oxide fuel-cell power plant is introduced by establishing the relationship between the stack terminal voltage, fuel utilization, and stack current. The analysis shows that both the terminal voltage and the utilization factor cannot be kept constant simultaneously wh…