Materials Literature
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Direct decomposition of NO into N2 and O2 on a C-type cubic (Gd1–x–yYxBay)2O3–y solid solution catalyst is investigated. These novel catalysts are found to exhibit higher activity and conversion rates than conventional La-containing perovskite oxide catalysts for NO decomposition. C-type cubic (Gd1–x–yYx-Bay)2O3–y cat…
The solid solution series Ba(In,Ce)O 3- δ has been investigated with respect to structure, formation, and mobility of protonic defects. Compared to the limited solubility of Y 2 O 3 in BaCeO 3 and BaZrO 3, the complete solubility of In 2 O 3 is suggested to reflect a relation between absolute hardness of the dopant an…
A novel class of orange-red phosphors based on Eu(3+)-activated LaNbTiO(6) was successfully fabricated by a wet chemical method, called a modified combustion approach. XRD, TG-DTA, SEM, and EDS results show that the heat-treatment of the powders above 1000 degrees C is enough to obtain highly crystallized and phase-pu…
Si-incorporated diamond-like carbon (Si-DLC) coatings ranging from 0 to 2 at % Si were deposited on Ti-alloy substrate by means of radio frequency plasma-assisted chemical vapor deposition (r.f. PACVD) technique, using a mixture of benzene (C(6)H(6)) and silane (SiH(4)) as the reaction gas. The synergy in wear and cor…
The network of the fibrillar collagens I, III, and V, extracted from fetal calf skin and cleaved with cyanogen bromide, was studied by means of ultraviolet matrix-assisted laser desorption ionization time-of-flight mass spectrometry (UV-MALDI MS). Nearly all of the expected cyanogen bromide peptides of the different a…
Binding of gold nanoclusters with size-expanded DNA bases, xA, xC, xG, and xT, is studied using quantum chemical methods. Geometries of the neutral xA-Au6, xC-Au6, xG-Au6, and xT-Au6 complexes were fully optimized using the B3LYP density functional method (DFT). The gold clusters around xA and xT adopt triangular geom…
Freestanding arrays of vertically aligned single-walled carbon nanotubes (VA-SWNTs) synthesized from alcohol were observed directly by transmission electron microscopy (TEM). These observations revealed that the films are comprised primarily of small bundles, containing 10 or fewer SWNTs per bundle. The absence of lar…
MoO3 was dispersed onto mesoporous SBA-15 by using ammonium heptamolybdate as MoO3 source. The formation of MoO3 was carried out by heating the loaded material to 500 °C for 3 h in air. Below 13 wt% Mo loading, no reflections of MoO3 occur in the X-ray powder patterns and even for high MoO3 contents, the intensities o…
La 0.5 Sr 0.5 MnO 3 cube and nanoparticle catalysts were synthesized by the hydrothermal and coprecipitation method, respectively. The catalytic performances for CO and CH 4 oxidation were evaluated, and the effect of Jahn−Teller distortion on the catalytic performance was elucidated. La 0.5 Sr 0.5 MnO 3 nanoparticle…
Natural gums have been traditionally applied in cosmetics and the food industry, mainly as emulsification agents. Due to their biodegradability and excellent mechanical properties, new technological applications have been proposed involving their use with conventional polymers forming blends and composites. In this st…
A localized etching method based on catalytic steam gasification was developed to modify carbon nanotubes in a pre-determined manner. The etching, occurring only at the interface, created different etching patterns depending on the iron catalyst by means of an eco-friendly, low-cost process using water vapor. Both the…
Two novel bis(amine anhydride)s, N,N -bis(3,4-dicarboxyphenyl)aniline dianhydride ( I ) and N,N -bis(3,4-dicarboxyphenyl)- p - tert -butylaniline ( II ), were synthesized from the palladium-catalyzed amination reaction of N -methyl-protected 4-chlorophthalic anhydride with arylamines, followed by alkaline hydrolysis o…
Abstract A novel perovskite‐type mixed‐conducting oxide of SrSc 0.05 Co 0.95 O 3‐δ (SSC) was synthesized by a combined EDTA‐citrate complexing method. The 5 mol % of Sc 3+ doping into the B‐site of SrCoO 3‐δ (SC) through the sol–gel synthesis effectively stabilized the oxygen vacancy disordered cubic perovskite struct…
Aluminum-substituted α-phase nickel hydroxide (Al−α-Ni(OH) 2 ) microspheres with high structural stability are synthesized, and their surface modification by CoOOH nanoparticles is made subsequently in order to improve their electrochemical performance. The morphology, microstructure, and chemical state of the Al−α-Ni…
Triphenylene derivatives possessing poly(ethylene oxide) (PEO) units exhibited discotic nematic (N D ) phases at room temperature. Unique phase transition from a N D phase to a hexagonal columnar (Col h ) phase was triggered by the addition of alkali metal salts. This phase transition was dependent on the type of the…
Two homochiral two-dimensional brick-wall complexes with only end-on azido bridges, [Cu3((R)-phea)2(N3)6]n (1) and [Cu3((S)-phea)2(N3)6]n (2) (phea=1-phenylethylamine), have been synthesized and structurally characterized. Magnetic studies show that both complexes are chiral ferromagnets with the magnetic transition t…
Single-crystalline CuS hexagonal nanoplates have been prepared through a facile chemical vapor reaction (CVR) process in which sulfur vapor reacted with copper films in a vacuum chamber at about 450 °C for about 7 h. The parent copper films were obtained on a silicon wafer or glass slide through vacuum evaporation of…
Using nonionic triblock copolymer F127 as a soft template and AAO membranes as hard templates, well-aligned free-standing mesoporous carbon nanofiber arrays have been fabricated on silicon wafer through a confined self-assembly process. Hexagonally arranged circular mesochannels locate at the edge of the carbon nanofi…
This paper reports a methodology for synthesizing and ordering gold nanorods into two-dimensional arrays at a water/hexane interface. This preparation method allows the systematic control of the nanoparticle film thickness. An investigation into the thickness-dependent surface-enhanced Raman scattering (SERS) of the a…
Vapor-phase polymerization is used for the first time to prepare ultrathin, polycrystalline conducting films of poly(3,4-ethylenedioxythiophene) (PEDOT). The polarized optical microscopy images (see figure) display the progress of crystalline growth at 30 °C: a) initial step of self-assembled PEDOT film formation (amo…