Materials Literature
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The heterostructures of ZnO nanorods on multiwalled carbon nanotubes (MWNTs) were fabricated by a seed-mediated growth method. First, the surfaces of the carbon nanotubes (CNTs) were coated in situ with mono-dispersed ZnO nanocrystals of about 7 nm by the reaction of zinc acetate and sodium hydroxide. These nanocrysta…
Luminescence phenomenon from NH2-terminated third generation poly(propylene imine) dendrimers in water was investigated. Two excitation bands (340 and 370 nm) and corresponding emission bands (approximately 400 and approximately 450 nm, respectively) were detected. Emission bands were intensified with time, heating an…
Abstract Ab initio molecular dynamics simulations have been performed on the (011) surface of α‐quartz at room‐temperature using density functional theory. Pristine surface was obtained by homolytic fracture of α‐quartz crystal, leaving exposed SiO· radicals, following which the surface was allowed to spontaneously re…
Kaffee oder Tee? Die schichtweise Abscheidung von mesoporösen Kohlenstoffmaterialien auf einer Quarzmikrowaage ergibt eine Struktur (siehe Bild), die sich zur hoch selektiven Bestimmung neutraler Gastmoleküle – etwa von Inhaltsstoffen des Tees – in wässriger Lösung eignet.
Starfish-like TiO 2:Sn/SiO 2:Sn core−shell nanocables with SiO 2:Sn nanowires were synthesized on a silicon substrate by thermal evaporation with addition of hydrogen gas at 1000 °C. In this synthesis, SnO 2, silica, and Ti powder were used as source materials. The hydrogen gas served to reduce the SnO 2 to SnO x (i.e…
The extinction spectra and E field distribution of a U-shaped nanostructure have been calculated using the discrete dipole approximation method, and compared to those of the parallel-nanorod structure. For a parallel-nanorod structure, when light propagates with its E field perpendicular to the nanorod axis only trans…
The authors carried out heat treatments, in-vacuum or in-air at 400 °C, to reduce the hydrogen outgassing rate from stainless steels. An outgassing rate as low as 2×10−14 Torr ℓ s−1 cm−2 was routinely achieved by a medium-temperature bakeout, but it took much longer time than reported to perform intensive thermal trea…
Pressure effect on superconductivity of iron-based arsenic-oxide ReFeAsO0.85 (Re=Sm and Nd), Yi, Wei, Sun, Liling, Ren, Zhian, Lu, Wei, Dong, Xiaoli, Zhang, Hai-jun, Dai, Xi, Fang, Zhong, Li, Zhengcai, Che, Guangcan, Yang, Jie, Shen, Xiaoli, Zhou, Fang, Zhao, Zhongxian
We investigate the permeability of metamaterials composed of superconducting quantum interference devices for a microwave probe field and derive the frequency spectrum of permeability and physical conditions for negative (real part) permeability, which may be essential to future experimental research on the new kinds…
The synthetic strategy for the convergent synthesis of emissive poly(amido amine) (PAMAM) den-drimers having the core chromophore via the copper-catalyzed 1,3-dipolar cycloaddition reaction between alkyne and azide was described. 2,7-Diazido-9H-fluorene, designed and synthesized to serve as the core in dendrimer, was…
Considering the wide applications of aryl diazonium functionalized single-walled carbon nanotubes (SWNTs) and the rapid progress in experiment, in this article we report the first theoretical study of the adsorption of aryl groups on a series of SWNTs using density functional theory (DFT) calculations. Tube diameter,…
Due to its excellent conductivity and catalytic activity toward oxygen reduction, silver has been used as cathode (or electrocatalyst), current collector, or electrical contact in low-temperature solid oxide fuel cells (SOFCs). Here we report our findings on the contamination of silver or a silver-containing cathode f…
This paper assesses the supramolecular structure of nanocomposites prepared by including the anti-inflammatory drug 5-aminosalycilic acid in halloysite nanotubes. Halloysite tubes have sub-micron individual lengths with outer diameters ∼0.1 µm, as observed by FESEM. The mercury intrusion plots showed bimodal profiles…
We achieved extensive control of the morphology and phase of colloidal cadmium telluride (CdTe) nanocrystals (NCs) using two different types of capping ligands, namely, amines and phosphonic acids having various alkyl chains ranging from butyl (C4) to octadecyl (C18). Among the alkylamines, the largest tetrapods are p…
Cu−Mn/zeolite-Y catalysts prepared using a coprecipitation impregnation procedure have been investigated to develop active Cu-based catalysts for the dimethyl ether synthesis from syngas. A great enhancement of CO conversion and DME selectivity is observed on Mn-containing catalysts compared to its Mn-free counterpart…
Solvothermal reactions of CuII salts and 3,5-bis(4-pyridyl)pyrazole (HL) under various conditions gave three different types of crystalline compound, namely [Cu2(Cu5L6)]BF(4).5 H2O (1 a), [Cu2(Cu5L6)]ClO(4).5 H2O (1 b), and [Cu7(CN)2(Cu5L6)2][BF4]3 (2). 1 a and b were obtained in ethanol and NH3.H2O, whereas 2 was obt…
Detailed analysis of X-ray diffraction data from four single crystals of eniluracil, prepared under different crystallization conditions, confirms a picture in which the crystals exhibit different degrees of disorder, which is also suggested by the computed low energy crystal structures. Since several of these crystal…
Biodegradable polymers have become the materials of choice for a variety of biomedical applications. In particular, poly(DL-lactide-co-glycolide) nanoparticles have been studied as a material for drug delivery with the controlled release. In this paper we are describing a simple method for obtaining the system for tar…
Experiments and density functional theory (DFT) calculations were combined in an attempt to investigate the origin of the differences in nitrogen concentration incorporated by N-doped TiO 2 . X-ray photoelectron spectroscopy (XPS), UV−vis diffusive reflectance spectra (UV−vis), and photodegradation experiments were co…
Water soluble high quality CdTe nanocrystals (NCs) with mercaptosuccinic acid (MSA) as stabilizer are prepared by refluxing and hydrothermal synthesis in this paper. The MSA stabilizer which comprises both thioglycolic acid (TGA)-like and 3-mercaptopropionic acid (MPA)-like moieties can accelerate the whole growth pro…