Materials Literature
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Water-medium clean organic reactions including isomerization and hydrogenation were carried out over a Ru(II) mesoporous organometallic catalyst (Ru-MOC) synthesized based on surfactant-directed coassembly of a bridged Ru(II) organometallicsilane and tetraethoxysilane. Owing to the large surface area, the ordered meso…
The IVA group metal Pb was found to be an efficient catalyst for the chemical vapor deposition (CVD) growth of single-walled carbon nanotubes (SWCNTs) under suitable conditions. Especially the volatility of Pb made it feasible to realize the direct growth of SWCNTs with no metallic catalyst residues. Three methods inc…
The precipitate formed by the addition of an aqueous solution of Co(NO 3 ) 2 and Al(NO 3 ) 3 to LiOH solution has been thoroughly studied as a function of the Al:(Al+Co) ratio, z, for 0 ≤ z ≤ 1, using X-ray diffraction and thermogravimetric analysis. For 0 ≤ z ≤ 0.2, the precipitate was a mixed phase of Co(OH) 2 and t…
BaF2fled no more: Monodisperse cubic- and orthorhombic-phase BaF2 nanocrystals were formed readily by the liquid–solid–solution approach. Nucleus growth of BaF2 occurs under kinetic control, whereby their size and morphology depend greatly on the ripening time and concentration of surfactants (see scheme). The phase o…
A novel, facile modified hydrothermal reaction route to nearly free-standing lead zirconate titanate (PZT) particles is presented. Simple mixing of fresh coprecipitates and mineralizer KOH followed by a hydrothermal treatment at 200 °C, produced PZT nanoparticles. Mineralizer KOH plays an important role in the size co…
The liquid crystal phase diagram of the discotic hard spherocylinder fluid is investigated by Monte Carlo simulations. Thickness-to-diameter aspect ratios within L/D=0.2-0.5 are considered. Three distinct columnar phases are found, namely, a hexatic interdigitated phase (D(hi)), a hexatic ordered phase (D(ho)), both w…
The electronic structures of undoped and fluorine-doped LaFeAsO superconductors and fluorine-doped SmFeAsO superconductors are studied using soft x-ray absorption and emission spectroscopy combined with full potential linearized augmented planes waves (FP LAPW) calculations. The comparison between the numerical simula…
Environment-induced effects on the E 2G G-band and A 1 ′ 2D-band Raman spectral features of single-layer graphene provide insights on the intrinsic and extrinsic dependences of the phonon energy and line width on temperature. Graphene prepared via mechanical exfoliation in air exhibits a G-band line width that increas…
We investigated the recently found superconductor ${\text{LaFeAsO}}_{1\ensuremath{-}x}{\text{F}}_{x}$ by x-ray absorption spectroscopy. From a comparison of the $\text{O}\text{ }K$ edge with LDA calculations we find good agreement and are able to explain the structure and changes in the spectra with electron doping. F…
Double-sided comb-like ZnO nanoferns have been successfully synthesized via a one-step hydrothermal synthesis without using any catalysts or templates. Their structure and morphology were characterized by scanning electron microscopy, transmission electron microscopy, and Fourier fast transformation technique. A possi…
A micromechanics model is developed for hexagonal honeycomb structures by using a modified couple stress theory. The formulation is based on structural analysis of repeating units and a homogenization procedure. Both bending and axial deformations of cell walls are considered here, unlike earlier models. The closed-fo…
History of the mode softening observation and its relation to the dielectric behavior around the cubic – tetragonal ferroelectric transition in BaTiO 3 is briefly reviewed. It is demonstrated that reliable microwave and recent THz dielectric data do not support any intrinsic dispersion in the clamped permittivity belo…
Using catechol-group-terminated Zn(II)−porphyrin (ZnP) to functionalize the single-crystalline TiO 2 nanoleaves and coordinate ZnP with trans -2,2′-ethylene 4, 4′-bipyridyl ( 1 ), we demonstrate the self-assembly of TiO 2 nanoleaves based on a supramolecular interaction. Compound 1 cross-links the adjacent TiO 2 nanol…
Collagen is a widespread protein family involved in a variety of biological processes. The complexity of collagen and its fibrous nature prevent detailed investigations on the full-length protein. Reductionist approaches conducted by dissecting the protein complexity through the use of model peptides have proved to be…
Leuchtender Cluster: Die direkte Übertragung fluorogener Silbercluster (SCs) von einer niedermolekularen Polyacrylsäure (PA) als Shuttle auf Einzelstrang-DNA(ssDNA)-Markierungen auf dem interessierenden Protein (siehe Bild) verläuft hochspezifisch. Bei der Übertragung nimmt die Clusterfluoreszenz um mehr als das Zehnf…
A series of dendrimeric compounds bearing pyrene units were synthesized to afford light-harvesting antennae based on the formation of intramolecular excimers. The synthetic plan profited from the efficiency of the Huisgen reaction, the 1,3-dipolar cycloaddition of azides and terminal alkynes, which allowed ready assem…
Studies conducted with various inexpensive carbon sources such as whey, vegetable oils (palm, mustard, soybean and coconut), a low-cost source of glucose-D, rice and wheat bran, and mustard and palm oil cakes demonstrated palm oil as the best substrate for accumulation of a novel short-chain-length-long-chain-length p…
The reflectivity of single-crystalline CoO has been studied by optical spectroscopy for wave numbers ranging from 100 to $28\text{ }000\text{ }{\text{cm}}^{\ensuremath{-}1}$ and for temperatures $8<T<325\text{ }\text{K}$. A splitting of the cubic IR-active phonon mode on passing the antiferromagnetic phase trans…
A series of binary transition metal phosphides (Ni 3 P, Ni 12 P 5, Ni 2 P, Ni 5 P 4, NiP, NiP 2, FeP, FeP 2, FeP 4, VP 2, CoP) were investigated by solid state 31 P MAS NMR, leading to rather different lineshapes, shifts, relaxation times, and temperature dependences. The electronic structures of these compounds were…
Abstract Wood plastic composites (WPCs) are attracting a lot of interests because they are economic, environmentally friendly, and show fairly good performance. To improve the performance of a wood/polypropylene (PP) composite, an organoclay was incorporated as a nanosize filler in this work. WPCs were prepared by mel…