Materials Literature
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The temperature dependencies of magnetic susceptibility in temperature range 4.2-250 K along the principal magnetic axes as well as frequency-field dependence EPR spectrum at helium temperature in basic plane was studied. It is found that ground state of CsPr(MoO4)2, is the quasi-doublet. The experimental values of g-…
We report on a study of (001) oriented fcc Fe-Ni alloy surfaces which combines first-principles calculations and low-temperature STM experiments. Density functional theory calculations show that Fe-Ni alloy surfaces are buckled with the Fe atoms slightly shifted outwards and the Ni atoms inwards. This is consistent wi…
Here we report a new class of molecular hydrogelators based on the conjugates of dipeptide and (naphthalen-2-yloxy)acetic acid. They form hydrogels efficiently—the lowest concentration for them to gel water is 0.07 wt%. Two hydrogelators show the ability to form helical nanofibers within the hydrogels, and the chirali…
We show in principle how to cloak a region of space to make its contents classically invisible or transparent to waves. The method uses sensors and active sources near the surface of the region, and could operate over broad bandwidths. A general expression is given for calculating the necessary sources, and explicit,…
Abstract Rigid polyurethane (PU) foams were prepared using three North American seed oil starting materials. Polyol with terminal primary hydroxyl groups synthesized from canola oil by ozonolysis and hydrogenation based technology, commercially available soybean based polyol and crude castor oil were reacted with arom…
Polycrystalline Bi1−xNdxFeO3 (x=0–0.15) thin films were prepared on (111) Pt∕Ti∕SiO2∕Si substrates via metal organic deposition method. The effect of Nd dopant on the structural, electric, and magnetic properties was studied. It was found that the ferroelectric polarization and saturation magnetization of the films we…
Magnetic nanoparticles exhibit unique nanoscale properties and their utilization for various magnetic systems is of significant interest. Especially, heterostructured magnetic nanoparticles are emerging as next-generation materials due to their synergistically enhanced magnetism and potential multifunctionalities. Her…
The authors have recently observed a giant electrocaloric effect (12K in 25V) in 350nm sol-gel PbZr0.95Ti0.05O3 films near the ferroelectric Curie temperature of 242°C. Here the authors demonstrate a giant electrocaloric effect (5K in 25V) in 260nm sol-gel films of the relaxor ferroelectric 0.9PbMg1∕3Nb2∕3O3–0.1PbTiO3…
BACKGROUND: The mechanisms governing the correlation between exposure to ultrafine particles and the increased incidence of cardiovascular disease remain unknown. Ultrafine particles appear to cross the pulmonary epithelial barrier into the bloodstream, raising the possibility of direct contact with the vascular endot…
Morphology-controlled nano- and microcrystals of ZnO (see figure) with different ratios of polar to nonpolar faces were synthesized through a soft-solution process. With these crystals, it is clearly demonstrated that a ZnO nanoplate with a large population of polar Zn(0001) faces is the most photocatalytically active…
We examine here cooling crystallization of aqueous paracetamol solutions in hollow fiber devices. It is shown that a solid hollow fiber crystallizer (SHFC)−static mixer assembly can be operated successfully up to 30−40°C below the metastable zone limit. Such a capability is not existent in industrial cooling crystalli…
A cholate-functionalized tetraphenylporphyrin (H 2 CFTPP) was obtained by attaching eight cholate units at the meta positions of the phenyl rings. Zn(CFTPP) favored binding a hydrophilic pyridyl ligand over a hydrophobic analogue in nonpolar solvents such as 20% MeOH/CCl 4 but had the reverse selectivity in 95% MeOH/C…
We studied systems that are built up of a mixture of phenyltrimethoxysilane (PTMS) and (3-methacryloxy)propyltrimethoxysilane (MPTMS). Four different molar ratios on the monomers MPTMS / (MPTMS + PTMS) (0.1, 0.2, 0.3, and 0.5) were co-condensed in bulk using formic acid as catalyst (molar ratio HCOOH/monomers = 3) at…
Three dendron−linear diblock copolymers with a polyene-type nonlinear optical (NLO) chromophore incorporated in the dendron segment and polystyrene as the linear block were synthesized to investigate the effect of nanostructures on electrooptic (EO) properties. These block copolymers form nanostructures with a periodi…
Iridium carbonyl clusters approximated as Ir 2 (CO) 8, Ir 4 (CO) 12, and Ir 6 (CO) 16 were synthesized by carbonylation under various conditions of Ir(CO) 2 (acac) sorbed in the cages of zeolite NaY. These supported clusters were decarbonylated by treatment in helium and used to catalyze ethene hydrogenation at atmosp…
Transient absorption results are presented on two types of GaSe nanoparticle aggregates. The results indicate that both types of aggregates exhibit larger emission oscillator strengths than the corresponding monomers, that is, superradiance. One type of GaSe nanoparticle is synthesized by conventional methods, and the…
The catalytic hydrogermylation of Si(CH CH 2 ) 4 with Ph 3 GeH yielded Si(CH 2 CH 2 GePh 3 ) 4 ( 1 ). In contrast, Sn(CH CH 2 ) 4 and Sn(CH 2 CH CH 2 ) 4 reacted with Ph 3 GeH under the same conditions, forming Ph 3 Ge(CH 2 ) 2 GePh 3 ( 2 ) and Ph 3 Ge(CH 2 ) 3 GePh 3 ( 3 ), respectively, whereas the reaction of Sn(CH…
Thin film honeycomb materials were prepared from regioselectively modified celluloses. The method uses water condensation at the surface of a cellulosic solution as an ordered template to form honeycomb structures. Pore size and distribution is controlled by several factors, one of which is the hydrophilicity of the c…
High Resolution Image Download MS PowerPoint Slide The self-assembly of discotic molecules of a metal-free alkoxy-substituted phthalocyanine derivative, 2,3,9,10,16,17,23,24-octakis(octyloxy)-29H,31H-phthalocyanine, in organic solvents was studied by optical microscopy, UV−vis spectroscopy, and scanning electron micro…
We performed neutron reflectometry (NR) and total internal reflection fluorescence (TIRF) spectroscopy to characterize the structure and the protein binding capacity of a planar poly(acrylic acid) (PAA) brush at different temperatures. A PAA brush was prepared by spin-coating planar quartz or silicon wafers with a thi…