Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Electrostatic properties of single-separated multiwalled carbon nanotubes (MWCNTs) deposited on a dielectric layer have been investigated by charge injection and electric force microscopy (EFM) experiments. We found that upon local injection from the biased EFM tip, charges delocalize over the whole nanotube length (i…
Novel dendronized copolymers bearing reactive anhydride groups along the backbones are reported in this paper. They were synthesized through copolymerizations of styryl macromonomers bearing Fréchet-type dendrons of the first to the fourth generation and maleic anhydride (MAn) through conventional radical polymerizati…
The half-Heusler compound CuMnSb, the first antiferromagnet (AFM) in the Mn-based class of Heuslers and half-Heuslers that contains several conventional and half metallic ferromagnets, shows a peculiar stability of its magnetic order in high magnetic fields. Density functional based studies reveal an unusual nature of…
We calculate the rate of nonradiative, F\"orster-type energy transfer (ET) from an excited epitaxial quantum well (QW) to a proximal monolayer of semiconductor nanocrystal quantum dots (QDs). Different electron-hole configurations in the QW are considered as a function of temperature and excited electron-hole density.…
Multiwalled carbon nanotubes were deposited by microwave chemical-vapor deposition on Fe, Co, and Ni catalyst layers. By adjusting the deposition temperature and time predominantly either a tubular structure or a bamboolike structure was obtained. The corresponding growth rates of these forms were determined. The acti…
Polyaniline (PANI) nanofibres were synthesized using a biocatalyst (recombinant Coprinus cinereus peroxidase) instead of toxic chemical oxidants. Relatively uniform nanofibres with 50–100 nm diameter were easily obtained with this method, and the doping state of the PANI nanofibre could be controlled either with 1N ca…
The quantization of lattice thermal conductance $g$ normalized by ${g}_{0}={\ensuremath{\pi}}^{2}{k}_{B}^{2}T∕3h$ (the universal quantum of thermal conductance) was recently predicted theoretically to take an integer value over a finite range of temperature and then observed experimentally in nanowires with catenoidal…
Abstract Three salts containing different iodobismuthate anions have been synthesized. [(CH 3 ) 2 NH 2 ] 3 [BiI 6 ] was prepared by oxidation of bismuth by iodine in N,N ‐dimethylformamide. [(CH 3 ) 2 NH 2 ] 3 [BiI 6 ] crystallizes in the space group ${\rm R}{\bar 3}$ with a = 30.760(3) Å and c = 8.8039(5) Å and conta…
Magnetite nanoparticles of 5 nm mean diameter, coated with 10-undecynoic acid, have been anchored to crystalline Si(100) surfaces via the hydrosilylation reaction at 180 °C. The iron content in the sample (0.54 ± 0.05 μg/cm 2 ) has been determined by atomic absorption analysis. The sample has been further characterize…
The successful growth of multiwalled carbon nanotubes on montmorillonite surfaces has been attained via chemical vapor deposition of acetylene and studied by means of electron microscopy, XRD, Mössbauer spectroscopy, and thermal analysis measurements. Clay surfaces loaded with different amounts and types of metal salt…
The reaction of the lanthanide salts LnI3(thf)4 and Ln(OTf)3 with tris(2-pyridylmethyl)amine (tpa) was studied in rigorously anhydrous conditions and in the presence of water. Under rigorously anhydrous conditions the successive formation of mono- and bis(tpa) complexes was observed on addition of 1 and 2 equiv of lig…
Carbon nanotubes (CNTs) were directly synthesized on flexible polymer substrates without damage of polymer by microwave irradiation. Cobalt was used as the catalysts, and the synthesis was done in the atmospheric pressure with an acetylene carbon source. Only 5 s was required for the synthesis of well-graphitized CNTs…
Abstract Graphite‐polymer nanocomposites were prepared by melt blending of various graphites (virgin graphite, expandable graphites, and expanded graphite) with polystyrene and its copolymers (acrylonitrile‐butadiene‐styrene (ABS) and high‐impact polystyrene (HIPS)). Nanocomposites were characterized by X‐ray diffract…
Kleine Gruppe – große Wirkung: Der Chiralitätstransfer von einer kleinen organischen Gruppe (D- oder L-Tartrat) auf ein großes Metalloxid-Netzwerk führt zu den enantiomerenreinen, nicht racemisierenden Polywolframaten d- und L-1 (siehe Bild, der mittlere Teil ist als Polyedermodell dargestellt; Zr purpurrot, W grau, P…
Excluded volume effects can account for most ordering transitions in simple liquids and liquid crystals. Starting with the work of Onsager, this has been demonstrated in the case of liquid crystals for a number of simple convex bodies, e.g. sphero-cylinders, for which the orientation-dependent pair-excluded volume cou…
The adsorption of a single and negatively charged polyion with varying flexibility onto a surface carrying both negative and positive charges representing a charged membrane surface has been investigated by using a simple model employing Monte Carlo simulations. The polyion was represented by a sequence of negatively…
Abstract A facile and versatile solution‐based approach was developed to prepare semiconductor metal oxide nanobelt‐conducting organic polymer core‐shell nanocomposites. Well‐defined nanobelts of several types of oxide nanobelts were combined with conducting polymer [polypyrrole (PPy) and polyaniline (PANi)] via in si…
Abstract A novel phosphorus‐containing trifunctional novolac (dopotriol) was synthesized through the addition reaction of 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene 10‐oxide and rosolic acid. The structure of dopotriol was confirmed with NMR spectroscopy and elemental analyses. The dopotriol was blended with phenol nov…
Hollow-fiber membranes of mixed conducting perovskite Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3 - δ were prepared using a sequence of extrusion, gelation, and sintering steps. For this purpose, a finely divided mixture of the component oxides was prepared by the modified Pechini technique and suspended in a polymer solution. Th…
A simple strategy in terms of fabrication time (within minutes) and composition phase domains was used to design optical cage mesostructured silica monoliths with shape- and size-controlled cavities and entrance pores, large-sized glass (crack-free), thick-walled framework up to 20 nm thick, uniformly sized mesopores…