Materials Literature
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The magnetic phase variations under hydrostatic pressure on multiferroic ${\text{BiMnO}}_{3}$ have been examined by the dc magnetization $[{M}_{g}(T)]$, magnetic hysteresis $[{\ensuremath{\mu}}_{eff}(H)]$, and ac susceptibility $[{\ensuremath{\chi}}_{g}^{\ensuremath{'}}(T)]$. Three magnetic transitions, manifested as…
This work demonstrates that it is possible to synthesize crystallized Ge nanostructures directly in an aqueous medium under ambient conditions by using widely available GeO2 (in the form of germanate ions) as a precursor. The reaction of germanate ions with NaBH4 in an aqueous medium resulted in highly hydrogenated Ge…
Single‐crystalline KTa 0.25 Nb 0.75 O 3 (KTN) nanorods with an orthorhombic perovskite structure were synthesized via a polymer‐assisted hydrothermal method. The preferred crystallographic orientation of the nanorods were found to be controllable by using different types of polymers in the process; that is, [001]‐orie…
In this work we propose a theory to describe the irreversible diffusive relaxation of the local concentration of a colloidal dispersion that proceeds toward its stable thermodynamic equilibrium state, but which may in the process be trapped in metastable or dynamically arrested states. The central assumption of this t…
Monazite‐type La 1 − x Sr x PO 4 ( x =0.025 and 0.05) nanoparticles have been obtained, for the first time, by milling a mixture of La(NO 3 ) 3 ·6H 2 O, Sr(NO 3 ) 2 , and (NH 4 ) 2 HPO 4 for only 3 h in a planetary ball mill using a moderate rotating disc speed (350 rpm). The formation of the La 1− x Sr x PO 4 takes p…
Abstract For solution of the problem of conductivity relaxation and diffusion of ions in ionic conductors with high density of ions, it is essential not to neglect treatment of the effects of many-ion dynamics. This view is shared by the Coupling Model (CM) and the MIGRATION CONCEPT (MC), although the treatment, empha…
Abstract The electrical conductivity and impact strength of polypropylene(PP)/EPDM/carbon black ternary composites were investigated in this paper. Two processing methods were employed to prepare these ternary composites. One was called one‐step processing method, in which the elastomer and the filler directly melt bl…
In this work, the use of PVDF flat membranes as contactors for direct solvent-free biphasic oxidation of cyclohexene to adipic acid has been reported. The oxidation has been carried out using 30% H 2 O 2 and ammonium molybdate ((NH 4 ) 6 Mo 7 O 24 ) in the presence of succinic acid. The effect of different membranes a…
High quality (001)-oriented Ba0.5Sr0.5TiO3 (BST) thin films have been grown on a-plane sapphire (112¯0) by rf magnetron sputtering using a double bridge layer consisting of (0001)-oriented ZnO (50 nm) and (001)-oriented MgO (10 nm) prepared by plasma-assisted molecular beam epitaxy. X-ray diffraction revealed the form…
The formation of a three-dimensional assembly of gold nanoparticles driven by host-guest interactions is described. Assembly is achieved via host-guest interactions between cyclodextrin-modified gold nanoparticles which associate with the adamantane unit of a redox active metal complex [Os(CAIPA)(3)](ClO(4))(2), where…
Quasielastic neutron scattering experiments (time-of-flight, neutron spin echo, and backscattering) on protonated poly(vinyl methyl ether) (PVME) have revealed the hydrogen dynamics above the glass-transition temperature. Fully atomistic molecular dynamics simulations properly validated with the neutron scattering res…
Chrysotile single-layered nanotubes, obtained by wrapping the Mg(3)Si(2)O(5)(OH)(4) lizardite monolayer along the (n,-n) hexagonal lattice vector, are simulated at the ab initio level by using an all electron 6-31G( *) basis set and the B3LYP functional for n varying from 14 to 24 (the nanotube radius R referred to th…
Recent quantum Hall experiments conducted on disordered graphene $p\text{\ensuremath{-}}n$ junction provide evidence that the junction resistance could be described by a simple Ohmic sum of the $n$ and $p$ mediums' resistances. However in the ballistic limit, theory predicts the existence of chirality-dependent quantu…
Crystal structure investigations, electrical resistivity, and magnetic measurements have been performed for polycrystalline samples of intercalated compounds Cr(x)TiTe(2) with a Cr concentration up to x = 0.65. According to the room-temperature x-ray diffraction study of Cr(x)TiTe(2), the initial hexagonal crystal str…
We report recent efforts to understand a broad range of experiments on confined water and protein hydration water, many initiated by a collaboration between workers at the University of Messina and MIT-the editors of this special issue. Preliminary calculations are not inconsistent with one tentative interpretation of…
We report reversible thermochromism of a conjugated polymer, poly{2,5-bis[3-(N,N-diethylamino)-1-oxapropyl]-1,4-phenylenevinylene} (DAO-PPV), in diluted solutions of toluene and 1,2-dichlorobenzene. By means of temperature- and solvent-dependent steady-state spectroscopy, picosecond time-resolved photoluminescence spe…
As a result of recent investigations on nanocrystalline (nc) materials, extensive experimental data on the deformation behavior of these materials have become available. In this article, an analysis of these data was performed to identify the requirements that a viable deformation mechanism should meet in terms of acc…
Two new cantilever-type polyoxometalates Na(5)(NH(4)){V(IV)[(Mo(2)O(6))CH(3)C(O)(PO(3))(2)](2)}.13H(2)O (1) and (NH(4))(4){V(IV)[(Mo(2)O(6))NH(3)CH(2)CH(2)CH(2)C(O)(PO(3))(2)](2)}.6H(2)O (2) have been synthesized and characterized by IR spectroscopy, UV-visible spectroscopy, elemental analysis, TG analysis, XPS, (31)P…
It is argued that the extended mode-coupling theory for glass transition predicts a dynamic crossover in the α-relaxation time and in the self-diffusion constant as a general implication of the structure of its equations of motion. This crossover occurs near the critical temperature T(c) of the idealized version of th…
Two rare-earth Zintl phases, Yb 11 GaSb 9 and Yb 11 InSb 9, were synthesized in high-temperature self-fluxes of molten Ga and In, respectively. Structures were characterized by both single-crystal X-ray diffraction and powder X-ray diffraction and are consistent with the published orthorhombic structure, with the spac…