Materials Literature
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Abstract Transparent glass‐ceramics with composition of 95SiO 2 –5LaF 3 doped with 0.1 mol% of Ho 3+ or co‐doped with 0.1 mol% of Ho 3+ and 0.3 mol% of Yb 3+ were synthesized by thermal treatment of precursor sol–gel glasses. Segregation of LaF 3 nanocrystals in the matrix was confirmed from a structural analysis by m…
We demonstrate the versatility of anomalous small-angle X-ray scattering (ASAXS) to investigate the morphology of bulk multicomponent composites comprising poly(stryrene- b -2-vinylpyridine) (PS−PVP) and Au nanoparticles. Contrast variation near the L 3 absorption edge of Au enables the separation of the partial scatt…
Abstract A novel nitrogen-doped mesoporous carbon with well-ordered two-dimensional (2D) structure has been successfully prepared for the first time using aniline as a source for both carbon and nitrogen, and SBA-15 as a template. The above material has been unambiguously characterized by various sophisticated techniq…
Hydrogenation−dehydrogenation properties in a Mg-added LiH−LiNH 2 hydrogen storage system were examined by using a newly developed gas chromatography technique with hydrogen pulse detection as 2LiNH 2 + ⋮Mg(surface) ←→ ⋮Mg(LiNH 2 ) 2 ←→ ⋮Mg(LiNH) 2 + H 2, ⋮Mg(LiNH) 2 + 2LiH ←→ ⋮ Mg(Li 2 N) 2 + 2H 2 (6.96 mass %). The…
Abstract Tb3Al5O12:Ce3+ (TAG:Ce3+) phosphors were prepared by a novel sol-combustion (SC) method, and the samples showed improved luminescent properties than those by conventional solid-state (SS) method. Bright white LEDs were fabricated and the performances of the LEDs confirm that TAG:Ce3+ prepared by SC method is…
In this paper we report on the synthesis of single-crystal Al 4 B 2 O 9 nanowires by calcining the precursor powder made of disodium tetraborate decahydrate and aluminum nitride in air conditions. The as-received nanowires possess smooth surface with diameters varying between 20 and 50 nm. We can also obtain Al 18 B 4…
Abstract In this paper we report the characterization of metal–polymer nanocomposites prepared by a novel simple route based on Polymer Stabilized Metal Nanoparticles (PSMNPs) inter‐matrix synthesis. This route is focused on the use of functionalized polymeric membranes for the synthesis and characterization of both P…
Selective hydrogenation of acetylene in rich ethylene was investigated over uncalcined, air plasma, and H 2 plasma Pd/TiO 2 and Pd−Ag/TiO 2 catalysts. Air and H 2 plasma treatments have different modifying effects on Pd/TiO 2 catalyst for selective hydrogenation of acetylene to ethylene. With additional Ag loadings, 1…
We developed rod−disc liquid crystalline molecules consisting of six calamitic mesogens and one discotic mesogen, which exhibit a biaxial nematic phase. In this ordered nematic phase, rodlike mesogens and disclike mesogens are completely mixed and intercalated.
Abstract We report on three new types of nanoelectromechanical systems based on carbon nanotubes: an electromechanical nanothermometer, a nanorelay and a nanomotor. The nanothermometer can be used for accurate temperature measurements in spatially localized regions with dimensions of several hundred nanometers. The na…
The arylamine N-acetyltransferases (NATs) are xenobiotic-metabolizing enzymes that catalyze the N-acetylation of arylamines and their N-hydroxylated metabolites. These enzymes play a key role in detoxication of numerous drugs and xenobiotics. We report here the cloning, functional expression, and characterization of t…
The optical properties of the nanoscale neodymium ceramic cluster (THF) 8 Nd 8 O 2 Se 2 (SePh) 16 (Nd8) and molecular (DME) 2 Nd(SC 6 F 5 ) 3 (Nd1) were studied by optical absorption, photoluminescence, and time-resolved spectroscopy. Both complexes exhibited emission characteristic of solid-state materials with bands…
The effects of chemical composition, calcination temperature, and the addition of potassium on the physicochemical properties and reactivity of MnCeO x systems in the catalytic wet oxidation (CWO) of phenol with oxygen ( T R = 373 K; P R = 1.0 MPa; w cat / w phenol = 5) have been addressed. Characterization data of “f…
An electrostatic layer-by-layer self-assembly technique was used to encapsulate solid core paclitaxel nanoparticles within a polymeric nanometer-scale shell. This approach provides a new strategy for the development of polymeric vehicles that control drug release and target diseased tissues and cells specific to the a…
Abstract Nanocomposite thin films composed by (BaTiO 3 ) 1– x –(CoFe 2 O 4 ) x with different cobalt ferrite concentrations ( x ) have been deposited by pulsed laser ablation on platinum covered Si(001) substrates. The films structure was studied by X‐ray diffraction and Raman spectroscopy. It was found that the CoFe…
The nanostructure of a spread monolayer of diblock copolymers of poly(hydrogenated isoprene) and poly(styrenesulfonate) at the air/water interface were studied by in situ X-ray reflectivity as a function of the brush density and salt concentration. When the monolayer was compressed beyond the "critical brush density",…
Highly monodisperse samples of diphosphine ligand (1,3-bis(diphenylphosphino)propane- or 1,5-bis(diphenylphosphino)pentane)-protected gold nanoparticles form rapidly in a mixed methanol/chloroform solvent environment. Methanol soluble octagold, decagold, and undecagold monolayer protected clusters yield very stable io…
A technique was developed to size-selectively separate polydisperse dispersions of CdSe/ZnS nanocrystals into distinct color fractions using only the tunable solvent properties of CO2-expanded hexane. This size-selective precipitation of semiconductor nanoparticles is achieved by finely tuning the solvent strength of…
Kühlender Magnet: In einem aus zehn Metallatomen bestehenden gemischtvalenten Mn-Supertetraeder (siehe Bild; Mn violett, O rot, N blau, Br braun, C grau) liegt ein Spingrundzustand von S=22 vor, und es überwiegt der ferromagnetische Austausch. Das magnetische Verhalten macht den Cluster für die Verwendung als magnetis…
Two bis(mu-phenoxo)dicopper(II) complexes, [(L(CH3))(2)Cu(2)] (1) and [(L(t-Bu))(2)Cu(2)] (2), where L(CH3) and L(t-Bu) represent the dianions of (methylamino)-N,N-bis(2-methylene-4,6-dimethylphenol) and of (methylamino)-N,N-bis(2-methylene-4,6-di-tert-butylphenol), respectively, are reported to demonstrate the effect…