Materials Literature
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lAn X-ray single-crystal structural investigation on a sample of cancrinite of formula Na7.13Ca0.87(Si6Al6O24) (SO4)(0.07)(CO3)(1.43) . 2H(2)O has been carried out. The cancrinite cage content has been found to be similar to that reported in previous structure refinements on natural and synthetic samples. However, dif…
Gramaccioliite-(Y) is a new mineral within the crichtonite group. It was found in the gneiss of the Hercynian Massif of Argentera, at Sambuco (Stura Valley, Piedmont, Italy). It occurs as black lamellar mm-sized crystals. Associated minerals are quartz, albite, muscovite, anatase, brookite, rutile, fluorapatite, xenot…
During investigations of the system Sc 2 O 3 -Al 2 O 3 -TiO 2- SiO 2 , a new, unusual silicate, K 2 ScFSi 4 O 10 , was synthesised as colourless pseudo-cuboctahedral crystals from a KF-MoO 3 flux. The crystal structure was determined from single-crystal X-ray diffraction data (Mo- Ka radiation, CCD area detector, 2𝛉 m…
Density functional theory (DFT) calculations are performed to study Cu2Ox (x = 1 - 4) clusters in their neutral, anionic and cationic states. The ground state structures are obtained and found to exhibit linear or near linear structures, which are different from the two- or three-dimensional ones suggested by the prev…
A scheme that allows on-chip growth of multiwalled carbon nanotubes at designed locations is demonstrated. The nanotubes were grown by thermal chemical vapor deposition and were contacted to nanoscaled Cr electrodes fabricated by standard e-beam lithography techniques. The contacts were found to be Ohmic with resistan…
We present a dynamical description of slow relaxation processes based on the extension of Onsager's fluctuation theory to systems in local quasi-equilibrium. A non-Markovian Fokker-Planck equation for the conditional probability density is derived, and from it we obtain the relaxation equation for the moments. We show…
The ferroelectric hysteresis and fatigue behavior over a wide temperature range from 290 to 50 K for SrBi2Ta2O9 thin films with Pt electrodes on silicon substrates, prepared by metalorganic decomposition (MOD) and pulsed-laser deposition (PLD), are investigated. It is found that given a fixed electrical field amplitud…
The reaction of Ln(acac)(3).3H(2)O (Ln = Sm, Eu, Gd, Dy, Yb) with K[Cr(2)(CO)(10)(micro-H)] at different molar ratios and solvents leads to the formation of nonanuclear lanthanide hydroxo acetylacetonate complexes of general formula [Ln(9)(OH)(10)(acac)(16)][HCr(2)(CO)(10)]. The compounds are isomorphous, and the comm…
Protein crystallization conditions are usually identified by empirical screening methods because of the complexity of the process, such as the existence of nonequilibrium phases and the different crystal forms that may result from changes in solution conditions. Here the crystallization of a model protein is studied u…
We have studied the third-order optical nonlinearity (χ(3)) of epitaxial thin films of layered compounds LaCuOS and LaCuOSe at room temperature by a spectrally resolved degenerative four-wave mixing technique with femtosecond time resolution. The χ(3) values in both films are sharply resonant to optical absorption ban…
Since the early report of adsorption on single-walled carbon nanotubes in 1997, a number of controversial publications have claimed the hydrogen capacity of these materials to be between 0.1 and 10.0 wt %. However, no study has yet demonstrated a plateau of adsorption with pressure that is consistent with monolayer sa…
We present simulation results for the dynamics of a schematic model based on the frustration-limited domain picture of glass-forming liquids. These results are compared with approximate theoretical predictions analogous to those commonly used for supercooled liquid dynamics. Although model relaxation times increase by…
Abstract An affinity dye ligand, Cibacron Blue F3GA, was covalently attached onto magnetic poly(2‐hydroxyethyl methacrylate) (mPHEMA) beads for human serum albumin (HSA) adsorption from both aqueous solutions and human plasma. The mPHEMA beads, in the size range of 80 to 120 µm, were prepared by a modified suspension…
An electron beam focusing structure was incorporated into the gated field emitter arrays where the emitters were screen-printed carbon nanotubes. The focusing structure was comprised of 8-μm-thick bulky SiOx focus gate insulator and Cr focus gate, and exhibited negligible leakage between the gate and the focus gate. I…
Irradiation of UV light to the solution of gold nanoparticles modified with thymine units resulted in the formation of aggregates comprising chemical cross-linking gold nanoparticles through the photodimerization of the thymine units. Transmission electron microscopy and UV-visible absorption measurement showed the ag…
The effect of pressure on the metal–insulator transition in manganites with a broad range of bandwidths is investigated. A critical pressure is found at which the metal–insulator transition temperature, TMI, reaches a maximum value in every sample studied. The origin of this universal pressure and the relation between…
Abstract Interpolymer complexes and blends were prepared based on poly(acrylic acid) and hydroxypropylcellulose. The structural features of polycomplexes and blends were evaluated by scanning electron microscopy and thermal analysis. It was found that the interpolymer complex obtained as a result of co‐precipitation o…
Aegirine is synthesized at temperatures as low as 200°C in the system Si, Fe, Na, H 2 O. Aegirine is mixed with a poorly crystallized 2:1 ferric phyllosilicate. At lower temperature, only 2:1 phyllosilicates are synthesized. A thermodynamic approach shows that the synthesized aegirine is in equilibrium with ferripyrop…
We report fabrication of array of crystalline nanowires (average diameter of 65 nm) of colossal magnetoresistive oxide La0.67Ca0.33MnO3 (LCMO, x=0.33) within anodized alumina templates by filling the pores with a sol that allows formation of LCMO phase at the relatively low temperature of 600 °C. The crystalline nanow…
Self-diffusion of Si in thermally grown SiO2 is modeled taking into account the effect of SiO molecules generated at the Si/SiO2 interface and diffusing into SiO2 to enhance the self-diffusion. Based on the model, a recent self-diffusion experiment of ion-implanted Si30 in SiO2, which showed increasing self-diffusivit…