Materials Literature
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We report the synthesis and ultrafast excited-state dynamics of two new meso-meso, β-β, β-β triply fused diporphyrins, Zn-3DP and Pd-3DP. Both compounds were found to have short excited-state lifetimes: Zn-3DP possessed an average S1 lifetime of 14 ps before nonradiative deactivation to the ground state, whereas Pd-3D…
The two aminobenzoic acid isomers 4-amino-3-hydroxybenzoic acid and 3-amino-4-hydroxybenzoic acid have been used to synthesize the corresponding half-sandwich Ru(II) complexes [( p -cymene)Ru(κN-ligand)X 2 ] (X = Cl, I). The solid state structures of all the complexes have been elucidated by single-crystal X-ray analy…
The eect of alkali treatment and ber content variation on the tensile properties of coir ber reinforced cashew nut shell liquid (CNSL) composite was studied. Biocomposite consisting of coir bers and cashew nut shell liquid resin was produced using the hand lay-up technique. The bers were treated with 5% NaOH and varie…
: We report that porous silicon acoustic Bragg reflectors and AlN-based transducers can be successfully combined and processed in a commercial solidly mounted resonator production line. The resulting device takes advantage of the unique acoustic properties of porous silicon in order to form a monolithically integrated…
The evolution of magnetic domain structure in epitaxial La0.625Ca0.375MnO3 films on (001) NdGaO3 is monitored as a function of temperature and magnetic field using magnetic force microscopy. We see two distinct regions of magnetic orientational order: one in-plane displaying contrast-less image and the other tilted aw…
The combined effect of Pb vacancies and La dopant can induce ferromagnetism below 75 K for Pb0.82La0.18TiO3 plates annealed at 700,1000, and 1200 °C for 1 h. Pb0.82La0.18TiO3 plates annealed at 1000 °C for 1 h show the coexistence of ferromagnetism resulting from oxygen vacancies at/near surfaces of nanograins and fer…
Defect engineering techniques have been employed to generate and remove oxygen vacancy defects in nanoparticles of Y2O3:Mn diluted magnetic oxide (DMO). These samples were prepared by thermal decomposition method followed by a series of thermal annealing in oxygen and forming gas. The x-ray absorption analysis reveals…
Using density functional theory with the climbing-image nudged-elastic-band method, we study the hydrogen-induced disruption of the ZnO(0001) polar surface. We show that a hydrogen atom adsorbed on the (0001) Zn surface can penetrate into the subsurface by overcoming an energy barrier. When a hydrogen atom approaches…
The degradation of organic-inorganic hybrid materials based on epoxy resin was characterized electrochemically in aggressive chemical electrolyte. In the present study, the hybrid material as primer was prepared from epoxy resin pigmented by zinc phosphate cured with polyamide (EPZ). The hybrid material was coated on…
We experimentally verify that a flat metamaterial lens formed by nonconnected crossed metallic wires enables the partial focusing of electromagnetic waves, as a consequence of the phenomenon of all-angle broadband negative refraction in such media. We prove that the strength of the negative refraction effect can be co…
We investigate nematic wetting and filling transitions of crenellated surfaces (rectangular gratings) by numerical minimization of the Landau-de Gennes free energy as a function of the anchoring strength, for a wide range of the surface geometrical parameters: depth, width, and separation of the crenels. We have found…
Ice is known to collapse to amorphous ice upon pressurization at low temperatures and shows the unusual feature of multiple distinct solid amorphous water states, which have inspired models of liquid water’s structure and unusual properties. Here, we use heat capacity C p measurements to show that similarly collapsed…
The inhibition effect of 5′ ‐phenyl‐2′ ,4′ ‐dihydrospiro[indole‐3,3′ ‐pyrazol]‐2(1H)‐one (SPAH) on mild steel corrosion in 1 M HCl and 0.5 M H2SO4 has been studied by weight loss, effect of temperature, electrochemical techniques, and quantum chemical studies. The inhibition efficiency increases with increasing concen…
Instant balls: Well-defined thiophene-coated functional nanospheres were synthesized by instantaneous self-assembly of twelve 90° PdII-containing compounds and twenty-four 120° organic bidentate ligands in acetone. This solvent system was efficient to prepare the self-assembled complexes, facilitating isolation and pu…
Density functional theory has been used to study the effect of hydrogen peroxide on the electronic properties of single walled carbon nanotubes. The metallic and semiconducting carbon nanotubes have been considered in the presence of different number of hydrogen peroxide. The results indicate that hydrogen peroxide ha…
A generic model of the hybrid system mainly consisting of a solid oxide fuel cell (SOFC) and a heat engine is established, in which some main irreversibilities existing in real hybrid systems are considered. On the basis of the developed models of the SOFC and Brayton cycle with a regenerative process, analytical expr…
Abstract The compound [VO(dien)]2GeS4 (1, dien = diethylenetriamine) features an ortho‐thiogermanate anion [GeS4]4–, which acts as tetradentate ligand joining [VO(dien)]2– complexes. The compound was obtained under solvothermal conditions crystallizing in thenon‐centrosymmetric orthorhombic space group Pna21 with a =1…
Magnetic properties of a tetragonal intermetallic compound GdFe${}_{5}$Al${}_{7}$ have been studied on a single crystal in static magnetic fields up to 14 T. The system is a ferrimagnet (${T}_{\mathrm{C}}$ $=$ 265 K) and on this premises we succeeded in describing its low-temperature magnetization curves as well as th…
A composite structure with two separately doped phases was introduced into Ni ‐doped LaCoO 3 ceramics to enhance its electrical conductivity while keeping low thermal conductivity. LaCo 0.9 Ni 0.1 O 3−δ nanoparticles were dispersed in the sol solution of La 0.9 Sr 0.1 Co 0.9 Ni 0.1 O 3−δ and separated from the solutio…
The synthesis and chiral recognition properties of a porphyrin host with introverted functionality is reported. The host is a hybrid of tetraphenyl zinc porphyrin and the N-phenylamide derivative of (S)-nipecotic acid. The chiral recognition properties of the porphyrin host with chiral carboxylate-containing guests is…