Materials Literature
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Chitosan-based coatings were used to delay ripening and prolong shelf-life of mango fruit stored at 15±1°C and 85—90% RH for 35 days. Mango fruits were treated with 2% chitosan solution or with 2% chitosan containing 1% tea polyphenols (TP—chitosan). Samples were taken at regular intervals for analysis. Results indica…
We analyze constant-voltage isotropic and nonisotropic scaling issues for phase change memory (PCM) based on electrothermal physics. Various analytical and simulation models of general and typical PCM cells that support the analysis is also provided. The analysis shows that the maximum temperature in the PCM cell, whi…
We report on temperature dependencies of infrared (IR) fundamental, combination, and overtone vibrations of hydroxyl species (OH) in nominally anhydrous minerals (e.g., titanite), ferroelectric crystals (KTa 1-x Nb x O 3 , KTN), layer silicates (talc, mica, and pyrophyllite), and hydrous minerals such as apatite and s…
The free space within a reaction cavity plays a determining role during the excited-state reaction of 1-(4-alkylphenyl)-3-phenylpropan-2-ones included within a capsule formed by two molecules of a deep cavity cavitand. By controlling the free space within the reaction cavity through remote alkyl substitution on the re…
We have investigated crystal structure of delafossite-type oxide CuFe 1- x Ni x O 2 (0 ≤ x ≤0.05) and measured its thermoelectric properties at high temperatures ranging from 300 and 1100 K. The lattice parameter a of the Ni 2+ -doped samples is nearly equal to that of CuFeO 2 , while the lattice parameter c of the Ni…
La0.7Sr0.3MnO3 (LSMO) is a mixed-valent room temperature ferromagnet with properties that are attractive for their applicability in biomedicine. We report, for the first time, immobilization of commonly used biocompatible molecules on LSMO nanoparticles, namely bovine serum albumin and dextran. The former was conjugat…
Plastic deformation in nanoscale multilayered structures is thought to proceed by the successive propagation of single dislocation loops at the interfaces. Based on this view, we simulate the effect of predeposited interfacial dislocation on the stress (channeling stress) needed to propagate a new loop parallel to exi…
The fluorescence of conjugated polyelectrolytes (CPEs) is efficiently quenched by low concentrations of quenchers with opposite charges. We have reported the close correlation between this amplified quenching phenomenon and CPE chain aggregation. In this paper, we further demonstrate the profound correlation between t…
High Resolution Image Download MS PowerPoint Slide Copper-exchanged Cu−MFI (Cu−ZSM-5) materials have been prepared by reacting H−MFI samples with 0.1 M Cu(II) acetate solutions. Interpretation (Rietveld method) of X-ray powder diffraction (XRPD) profiles corresponding to two fully dehydrated Cu−MFI phases, reveals the…
We employ density-functional theory within the generalized-gradient approximation to investigate infinitely long [0001] ZnO nanowires with hexagonal cross section. We report atomic relaxations, formation energies, and electronic structure of bare ZnO wires with small diameters. We find that relaxations on the facets a…
Electromigration (EM) is an important reliability concern in ultralarge-scale integration interconnects. A refined EM model based on a driving force approach is proposed in this work. The distribution of atomic flux divergence is computed by an finite element method to predict the void nucleation site in interconnects…
Ti 3 Si C 2 thin films were synthesized by magnetron sputtering from Ti3SiC2 and Ti targets. Sputtering from a Ti3SiC2 target alone resulted in films with a C content of ∼50at.% or more, due to gas-phase scattering processes and differences in angular and energy distributions between species ejected from the target. A…
Extended abstract of a paper presented at Microscopy and Microanalysis 2007 in Ft. Lauderdale, Florida, USA, August 5 – August 9, 2007
The heat of formation, ΔHf, for La2Ni10H14, an important property for hydrogen storage, was remarkably overestimated in calculations, and has discouraged the use of first principles total energy methods in the search for novel metal hydrides. Here, we employ the all-electron full-potential linearized augmented plane w…
Hf(1-x)Lu(x)W(2)O(8-y) solid solutions up to x = 0.04, based on a negative thermal expansion material HfW(2)O(8), were synthesized by a solid state reaction method. X-ray diffraction experiments of these solid solutions from 90 to 560 K indicated thermal contraction with increasing temperature. Temperatures of order-d…
The VAPEX computer code is used to analyze three large-scale experiments in corium/water interaction performed at the FARO Facility. Only the mixing of a corium jet with water at different values of pressure is studied in experiments L-14 and L-24; in experiment L-33, an initiating device is used to make a steam explo…
A soft solution method for synthesizing nanocrystalline CeO2 powders via formation of cerium citrate compounds with subsequent thermal decomposition was studied. Increasing calcinations temperature could result in a larger crystalline size, while increasing the citric acid content resulted in the powders with less agg…
The crystal chemistry of three Li-, Fe-, and Mn-rich trioctahedral micas has been characterized by single-crystal X-ray diffraction. The samples are from Hirukawa mine, Japan: (Si 3.43 Al 0.57 )(Al 1.00 Fe 0.38 Mg 0.01 Mn 0.17 Li 1.44 )(Na 0.05 K 0.95 )O 10 F 1.88 (OH) 0.12 ; from Mokrusha mine, Russia: (Si 3.30 Al 0.…
New epoxy-containing cyclopropylstyrenes were synthesized and their copolymerization with styrene in benzene in the presence of AIBN was studied. The reactivity ratios of cyclopropylstyrenes (r 1) and styrene (r 2) range from 1.15 to 1.18 and from 0.55 to 0.58, respectively, and the parameters Q 1 and e 1 vary over 2.…
It is shown that the problem of excitation of a magnetodielectric layer with parameters ɛ and μ equal to minus unity by a point source is not always solvable. Conditions under which the problem has a solution are established. It is found that, in the vicinity of the singular point ɛ = μ = −1, determination of the fiel…