Showing papers in "Journal of Physics and Chemistry of Solids in 2006"

TL;DR: In this paper, the degree of hydration and the kinetics of water uptake depend crucially on the preparation and aging conditions of graphite oxide (GO) compounds, and the best sample they have ever got shows layer distances of 8, 9 and 11.5 A u at relative humidities of 45, 75 and 100%, respectively.

TL;DR: In this paper, the synthesis and detailed characterization of graphite thin films produced by thermal decomposition of the face of a 6H-SiC wafer, demonstrating the successful growth of single crystalline films down to approximately one graphene layer, was carried out in ultrahigh vacuum (UHV) conditions.

TL;DR: In this paper, a new parameter, namely the Stability Index, was introduced to quantify the thermal stability of zeolites, which is based on the zeolite breakdown temperatures from X-ray diffraction studies.

TL;DR: In this paper, the authors investigated the regularities of lattice constant in ideal perovskites using a total of 132 ABX3-type compounds, including oxides and halides.

TL;DR: In this paper, the authors have successfully intercalate methotrexate (MTX) into layered double hydroxides (LDHs), Mg2Al(OH)6(NO3)·0.1H2O, through conventional co-precipitation method.

TL;DR: In this paper, the absorption spectra and luminescence of Beta gallium oxide (beta-Ga2O3) single crystals were measured and attributed to the existing of quantum wells above the valence band and the red light was owed to the electron-hole recombination via the vicinity donors and acceptors.

TL;DR: In this article, two Ce 3+ -doped scintillator crystals, LSO (Lu 2 SiO 5 :Ce) and LPS (LPS 2 Si 2 O 7 : Ce), were studied by EPR spectroscopy.

TL;DR: The lattice parameters of Ti 2 AlN and Ti 2 C powders were measured as a function of pressure up to ≈50 GPa, using a synchrotron radiation source and a diamond anvil cell as discussed by the authors.

TL;DR: In this article, the thermal stability of PVC composites containing different LDH additives was tested in sheets having a thickness of about 1.11nm and the results showed that the early coloring of PVC is markedly improved and the long-term stability slightly reduced by addition of the MgZnAl-maleate-LDH.

TL;DR: In this article, the authors show that the amount of added surfactant has a direct effect on the interlayer separation and organophilicity-hydrophilicity balance of the organo clay mineral, evidencing a particular behavior transition about OMt1.

TL;DR: In this paper, the crystal structure and electromagnetic properties as well as thermal stability of the A-site ordered PrBaMn 2 O 6 manganites have been investigated using two-step synthesis mode.

TL;DR: In this article, the percentage of crystallinity for polyaniline doped with camphor sulphonic acid has been estimated from the X-ray diffraction studies and is around 56% with respect to polyanile emeraldine base.

TL;DR: In this paper, the energy levels of the trivalent lanthanide Ho(sup 3+) in Y3Al5O12 (YAG) and Lu3Al 5O12(LuAG) have been measured, and the results have been fit to a free ion plus crystal field Hamiltonian to generate a theoretical set of energy levels.

TL;DR: In this paper, a pure NiFe 2 O 4 spinel has been prepared from an Ni-Fe 2+ -Fe 3+ -LDHs precursor under mild conditions for use as the anode material in Li-ion batteries.

TL;DR: In this article, the capacity of calcined Mg-Al-CO 3 -LDH to remove the acid herbicides 2,4-D, MCPA and Picloram from aqueous solution, as well as investigate the influence of pH on the regeneration process.

TL;DR: In this article, the intercalation of polystyrene into the interlamellar spaces of kaolinite was reported by a free radical polymerization reaction of styrene in the presence of a Kaolinite-DMSO intercalate as a starting material.

TL;DR: In this article, the optical properties and electrical conductivities of tin oxide doped beta-Ga2O3 single crystals with different Sn4+ concentrations were systematically studied and it was found that their conductivities and optical properties were influenced by the Sn 4+ concentrations and annealing.

TL;DR: In this paper, a complex perovskite oxide barium aluminium niobate, BaAl 1 / 2 Nb 1/2 O 3 (BAN) was synthesized by a solid-state reaction technique for the first time.

TL;DR: The coprecipitation behavior of amino acids and oligopeptides was found to be influenced by the solution pH and the kind of their side chain groups, and reached the maximum at pH 8 or 9.

TL;DR: In this paper, a number of studies, viz. optical absorption, infrared and ESR spectra and magnetic susceptibility, were carried out as a function of manganese ion concentration.

TL;DR: In this article, the Gutzwiller-Resonating Valence Bond theory was used to explain the tunneling conductivity between a metallic point and a cuprate high-T c superconductor.

TL;DR: In this article, the effect of different types of disordering on the optical absorption processes and specific features of compositional changes in the absorption edge spectra under S→Se and Br→I anion substitution in the mixed crystals are investigated.

TL;DR: In this paper, a facile and energy saving sol-gel combustion method has been used to prepare pyrochlore La2Zr2O7 nanocrystals, which have been obtained at a relatively low temperature with the grain size ranging from 45 to 70nm.

TL;DR: In this paper, the complex dielectric and AC conductivity response of $BaBi_2Nb_2O_9$ relaxor ferroelectric ceramics were studied as a function of frequency (100 Hz-10 MHz) at various temperatures.

TL;DR: In this article, the DNA was successfully intercalated into layered double hydroxide (LDH), Mg2Al(OH)6NO3·0.1H2O, through ion exchange reaction to form DNA-LDH nanohybrid.

TL;DR: In this article, the high pressure behavior of molybdenum disulfide (MoS{sub 2}) was investigated using an energy dispersive synchrotron X-ray diffraction method in a diamond anvil cell to 38.8 GPa at room temperature.

TL;DR: In this paper, the high temperature crystal chemistry of scheelite type (space group: I 4 1 / a ) CaMoO 4 (powellite) is reported by using high temperature X-ray diffractometer (HT-XRD) data in the temperature range of 25-1000°C.

TL;DR: In this paper, the temperature dependence of the Raman modes in anatase TiO2 nanocrystals has been investigated over the temperature range 77 − 873 K. The anharmonic effects contribute a lot to the temperature dependent behavior of the frequency and linewidth of all of the three modes.

TL;DR: In this article, the electrochemical behavior of composite lithium iron phosphates, at higher rates of charge-discharge, at lower operating temperatures and during long cycle life tests, was reported.

TL;DR: In this article, size-controlled Mn0.67Zn0.33Fe2O4 nanoparticles in the wide range from 80 to 20nm have been synthesized, for the first time, using the oxidation method.