Materials Literature
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The adsorption of NO and CO was studied on an alumina-supported palladium catalyst by in situ diffuse reflectance infrared spectroscopy (DRIFTS). The temperature range was 50-160 degrees C and a wide variety of partial pressures was used. The band-target entropy minimization (BTEM) algorithm was applied to the DRIFTS…
The ?-? phase transformation in Si3N4 was studied for seeded samples using an Y2O3-Al2O3 mixture as a sintering aid. The concentration of ?-seeds varied from 0 to 5 wt.%. The results showed that ?-? phase transformation followed the first-order reaction. The calculated activation energy for seeded samples was in the r…
The Potentiometric Cycling for Polymorph Creation [PC] 2 has been applied to sparfloxacin, a third-generation fluoroquinolone antibiotic. Two different trihydrate phases precipitate from aqueous solution. X-ray data indicate that one of these is a previously unknown polymorph of sparfloxacin trihydrate. Because both f…
Carbon-based electrode materials have been widely used for many years for electrochemical charge storage, energy generation, and catalysis. We have developed an electrode material with high specific capacitance by entrapping graphite nanoparticles into a sol-gel network. Films from the resulting colloidal suspensions…
The synthesis of binuclear organometallic ruthenium complexes of an expanded porphyrin-type macrocycle is reported; pyrrolic hydrogen bonding donors were found to interact with ancillary ligands in the primary coordination sphere and to stabilize coordinated dioxygen in an eta(2)-fashion.
Multistage mass spectrometry (MS(n)) experiments reveal that gas phase silver iodide cluster cations, Ag(n)I(m)(+), are readily built up in a stepwise fashion via ion-molecule reactions between mass selected silver (Ag(3)(+) and Ag(5)(+)) or silver hydride (Ag(2)H(+) and Ag(4)H(+)) cluster cations and allyl iodide, in…
A 1,3-phenylene linked poly(phenothiazine cation radical) was synthesized and its through-bond spin interaction was investigated. Monomer and dimer models were also synthesized to investigate the behaviour of spins in poly(phenothiazine cation radical). X-Ray crystallographic analysis of the monomer model showed that…
Starting from a first principle many-body theory, we derive a general formula to describe overall features in core-level photoemission including plasmon losses and peak asymmetry due to X-ray singularity. In the high-energy region we can derive quantum Landau formula which is directly compared with the corresponding c…
Well-aligned ZnO nanorod arrays were synthesized noncatalytically on a conducting aluminum-doped zinc oxide (AZO) buffer layer. The synthesis uses no metal catalyst and is cost-effective. The buffer layer facilitates the growth of vertically aligned nanorods; furthermore, we demonstrate that the optical properties of…
The spontaneous reduction of HAuCl4 in the partially acetylacetanato (acac) complexed aluminium tri-sec-butoxide [Al(O-s-Bu)3−0.66(acac)0.66] solution results in the formation of stable and well dispersed Au nanoparticles (AuNPs). Generation of such AuNPs (Au0) occurred through unstable AuI intermediates, and their si…
An equifield strength model has been established to elucidate the formation mechanism for the highly ordered alumina pore arrays and titanium oxide nanotubular arrays prepared via a common electrochemical methodology, anodisation. The fundamentals of the equifield strength model was the equilibrium between the electri…
Currently, two composites types are being developed for incore application: carbon fiber carbon composite (CFC), and silicon carbide fiber composite (SiC/SiC.) Irradiation effects studies have been carried out over the past few decades yielding radiation-tolerant CFC’s and a composite of SiC/SiC with no apparent degra…
Carbon nanofibers (CNFs) have been synthesized in high yield (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="E1"><mml:mo>></mml:mo><mml:mn>70</mml:mn></mml:math>%) by catalytic chemical vapor deposition (CCVD) on Co/LiF catalyst using acetylene as carbon source. A novel catalyst support (LiF) is repor…
A method for the preparation of ligand‐covered superparamagnetic iron oxide nanoparticles via exchange reactions is described. 1,2‐diol‐ligands are used to provide a stable binding of the terminally modified organic ligands onto the surface of γ ‐Fe 2 O 3 ‐nanoparticles ( r ~ 4 nm). The 1,2‐diol‐ligands are equipped w…
By using racemic (rac)-2-amino-1,2-diphenylethanol and achiral fluorescent 1-fluorenecarboxylic acid, a two-component columnar host system with multiple molecular response (guest-dependent spontaneous resolution and fluorescence) properties in the solid state was created.
To clarify the effect of micro/nanosizing of materials onto biological organism, the particle size dependence of reaction of cells and tissue as investigated by both biochemical cell functional test and animal implantation test. Especially for nanoparticles the behavior of invasion and internal diffusion inside body w…
Periodic Mesoporous Organosilicas (PMOs) have been used as precursors to produce porous Silicon Oxycarbide glasses after pyrolysis at 1000°C in inert atmosphere. Up to now only PMOs with cubic ordering could be successfully converted into an ordered mesoporous SiCO glass. In our work we prepared, under strong acidic m…
A new series of liquid crystalline conjugated oligomers, namely laterally and terminally alkyl-substituted derivatives of oligo(1,4-phenyleneethynylene)s, were synthesized, and the relationships between the molecular structures and the mesomorphic properties were investigated. The mesomorphic properties of the oligome…
Macroporous silica films with methyl groups grafted on their surface were prepared from polymethylhydrosiloxane (PMHS) and tetraethylorthosilicate (TEOS) without templates. Compared to the conventional template syntheses, this approach has several advantages. First, it avoids the removal of templates, which is sometim…
The adsorption of Au and Pd atoms on two nanostructured titania monolayers grown on the Pt(111) surface is investigated via a computational approach. These phases present compact regions (zig-zag-like stripes) with titanium atoms at the oxide-metal interface and oxygen in the top-most overlayer, sometimes intercalated…