Materials Literature
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Tetragonal ferrimagnetic spinel Mn3O4 shows complex magnetic phase transitions due to competing anti ferromagnetic interactions involving Mn2+/3+ ions with difference valences. Using magnetization and neutron diffraction measurements, we propose that its tetragonal lattice possesses an instability towards orthorhombic…
Motivated by recent experimental data on thin film superconductors and oxide interfaces, we propose a random-resistor network apt to describe the occurrence of a metal–superconductor transition in a two-dimensional electron system with disorder on the mesoscopic scale. We consider low-dimensional (e.g. filamentary) st…
It has been hypothesized that application of the micromechanical environment that target cells experience in vivo enhances functionality of differentiated cells. Vascular endothelial cells, functioning at the interface of the blood-vessel wall, are vital to the performance of the cardiovascular system. They are subjec…
Sm 1− x Sr x CoO 3 ((0.1 ⩽ x ⩽ 0.9), SSC) with perovskite-type structure is successfully prepared by the conventional solid-state reaction method. The phase structure, optical property, electrical conductivity and infrared emissivity are all closely related to the samarium-to-strontium ratio in the SSC system. X-ray d…
Textured barium titanate (BaTiO(3)) films are attracting immense research interest due to their lead-free composition and excellent piezoelectric and dielectric properties. Most synthesis methods for these films require a high temperature, leading to the formation of a secondary phase and an overall decrease in the el…
The adsorption of thiolates on Au surfaces employing density-functional-theory calculations has been studied. The dissociative chemisorption of dimethyl disulfide (CH(3)S-SCH(3)) on 14 different Au(hkl) is used as a model system. We discuss trends on adsorption energies, bond lengths, and bond angles as the surface st…
In this study, we report the development of a new route for the synthesis of polymer–PbS nanocomposite thin film by a novel solar irradiation-induced reaction which is completely free from any complexing agents and toxic chemicals. The as synthesised polymer–PbS thin films were characterised by X-ray diffraction (XRD)…
The crystallization behavior of poly(3-hydroxybutyrate) (PHB) thin films on poly(vinylphenol) (PVPh) substrate was investigated by surface-sensitive grazing incident X-ray scattering and infrared reflection–absorption spectroscopy techniques. Compared with the crystallization of PHB on a Si wafer, the PVPh sublayer di…
In this paper, a formalism for the activation volume of glass-forming materials is suggested. An isothermal equation of state for the activation volume is formulated, which is extended to a generalized equation of state that describes the activation volume as a function of temperature and pressure. Both the equations…
A systematic study on the effect of secondary decay on the symmetry energy coefficient extracted by isoscaling and the recently proposed isobaric yield ratio methods within the statistical multifragmentation model (SMM) is performed. The correlations between the input symmetry energy coefficients and the calculated on…
BACKGROUND: The Prussian blue analogues represent well-known and extensively studied group of coordination species which has many remarkable applications due to their ion-exchange, electron transfer or magnetic properties. Among them, Co-Fe Prussian blue analogues have been extensively studied due to the photoinduced…
The performance of devices based on semiconductor nanocrystals (NCs) improves both with stronger interface interactions among NCs and between NCs and solid electrode surfaces. The combination of X-ray photoelectron spectroscopy (XPS) and solid (31)P CP/MAS NMR (cross-polarization/magic angle spinning nuclear magnetic…
Void filling in (I) Bi(x)-added Co(4)Sb(12) or (II) Sb/Bi substitution of Co(4)Sb(12-x)Bi(x) has been investigated for structural and thermoelectric properties evaluation. X-ray powder data Rietveld refinements combined with electron probe microanalyses showed a polycrystalline and practically Bi-free CoSb(3) skutteru…
Stable aqueous dispersions of superparamagnetic iron oxide nanoparticles were synthesized in one step in the presence of a zwitterionic siloxane as the stabilizing/capping/solubilizing ligand. The hydrodynamic diameter of the particles was tuned by controlling the concentration of zwitterion siloxane, which ultimately…
Ordered mesoporous (2-50 nm) carbon films were fabricated using cooperative self-assembly of a phenolic resin oligomer with a novel block copolymer template (poly(styrene-block-N,N-dimethyl-n-octadecylamine p-styrenesulfonate), (PS-b-PSS-DMODA)) synthesized by reversible addition-fragmentation chain transfer (RAFT) po…
We present detailed electronic band-structure calculations for antiferromagnetic chromium compounds, CuCrX(2) (X = S, Se or Te), carried out using spin-polarized density functional theory within the generalized-gradient approximation (GGA). A narrow-band semiconductor-to-metal transition is observed upon replacement o…
The long-standing controversy concerning the effect of electron-electron interaction on the electrical conductivity of an ideal graphene sheet is settled. Performing the calculation directly in the tight binding approach without the usual prior reduction to the massless Dirac (Weyl) theory, it is found that, to leadin…
The Ca(BH 4 ) 2 –MgH 2 composite system represents a promising candidate for mobile hydrogen storage due to a 10.5 wt % theoretical hydrogen storage capacity and an estimated equilibrium temperature lower than 160 °C. For this system, the reversibility was achieved without further addition of additives. In this study,…
Although lipid nanoparticles are promising drug delivery vehicles, passive release of encapsulated contents at the target site is often slow. Herein, we report contents release from targeted, polymer-coated, echogenic lipid nanoparticles in the cell cytoplasm by redox trigger and simultaneously enhanced by diagnostic…
We consider a simple integrable model of a spin chain exhibiting the magnetoelectric effect (MEE). Starting from the periodic $S=1/2$ XXZ chain with Dzyaloshinskii-Moriya terms, which we consider as a local electric polarization in the spirit of the Katsura-Nagaosa-Baladsky (KNB) mechanism, we perform the mapping onto…