Materials Literature
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The electrochemistry and UV-vis spectral properties of neutral and electroreduced Al(III) phthalocyanine, (Pc)AlCl, were characterized in four different nonaqueous solvents (THF, DMSO, DMF, and pyridine) containing tetra-n-butylammonium perchlorate, as well as in THF containing 0.4 M TBAP and the more strongly coordin…
A combination of neutron diffraction augmented with isotopic substitution and computer modeling using empirical potential structure refinement has been used to extract detailed structural information for L-glutamic acid dissolved in 2 M NaOH solution. This work shows that the tetrahedral hydrogen bonding network in wa…
The ground- and excited-state properties of a series of photochromic barbiturate receptors (N,N'-bis{6-[omega-(anthracen-9-yloxy)alkanoylamino]pyridin-2-yl}-5-t-butyl-isophthalamide, Tn), in which anthracene chromophores are tethered via (CH2)n (n = 1, 3-6) polymethylene linkers to the H-bond receptor moiety, are desc…
Reactions between Co(OAc)2 and 2-amino-2-methyl-1,3-propanediol (ampdH2) afford a hexanuclear complex [Co6(H2O)(MeOH)(OAc)6(ampd)4] (1) and a one-dimensional coordination polymer comprised of discrete heptanuclear complexes covalently bound to mononuclear Co centers [Co8(H2O)2(OAc)7(ampd)6]n (2). While 1 is obtained u…
Abstract Photochromic compounds are currently recognized as the promising candidates for future optoelectronic devices, such as memories and switches. Photochemical pericyclic reactions between 1,3,5-hexatriene and 1,3-cyclohexadiene have been used in several ways to construct versatile photochromic compounds. Recent…
To understand the mechanism of quail eggshell biomineralization, we have performed two CaCO(3) precipitation experiments. In the reprecipitation experiments, supersaturated Ca(HCO(3))(2) was prepared by bubbling CO(2) through a slurry of biogenic CaCO(3) obtained from bleach-treated eggshell followed by filtration to…
We present {\it ab initio} density-functional calculations of molecular solids formed from C$_{28}$-derived closed-shell fullerenes. Solid C$_{28}$H$_4$ is found to bind weakly and exhibits many of the electronic structure features of solid C$_{60}$ with an enhanced electron-phonon interaction potential. We show that…
We study the behavior of the C60 molecule under very high internal and external pressure using Tersoff potential. As a result, we calculate the critical internal and external pressures leading to its instability. We also calculate stretching force constant, breathing mode frequency and bulk modulus of this molecule. T…
It is presented some technological parameters and physical characteristics of Fe - Ni - Al composite materials, fabricated by pressing with following sintering at a high temperature, and also shock-wave compacted using explosives. The comparison of materials properties fabricated using different technologies at equal…
Based on the helical and rotational symmetries and Tersoff-Brenner potential with couple of modified parameters, we investigate the variation of bond length/lengths in equilibrium structure due to tube length as well as due to applied hydrostatic pressure for a series of high symmetry armchair (n,n) single-wall nanotu…
Phonon dynamics of alkali metal atom, M doped in C60, forming MC60 solids in fcc phase has been studied. The calculations take into account Van-der-Waals and Coulomb interactions for M-C60 and C60-C60 and show fairly good agreement with reported neutron scattering results for RbC60. The calculations have also been don…
Spider silk fibers have remarkable mechanical properties that suggest the component proteins could be useful biopolymers for fabricating biomaterial scaffolds for tissue formation. Two bioengineered protein variants from the consensus sequence of the major component of dragline silk from Nephila clavipes were cloned a…
A facile aqueous pathway has been demonstrated for the synthesis of ordered mesoporous carbon materials with hexagonal or cubic structures through the self-assembly of phenol/formaldehyde resols and triblock copolymer templates. Highly ordered mesoporous carbons FDU-16 with body-centered cubic structure (space group I…
In this paper, bulk nanocomposite permanent magnets are prepared by spark plasma sintering (SPS) technique using melt-spun powders with a nominated composition of Pr4.2Tb0.3Fe78B17.5. Effect of processing conditions on the density, microstructure, and magnetic properties of the magnets are studied. Higher sintering te…
In this paper, we present a method of using the experimental first-order reversal curves (FORC) distribution as input for Preisach-type models. In order to be able to calculate in the model the integral over the FORC distribution we designed an interpolation algorithm of the three-dimensional (3-D) distribution. The a…
FeAlO$_3$polycrystalline sample was fabricated by the sol-gel method. The crystallographic and magnetic properties of the sample were measured using X-ray diffractometer, MÖssbauer spectroscopy, and vibrating sample magnetometer (VSM). The crystal structure was found to be an orthorhombic with the space group$Pna2_1$,…
The objective of this study was to investigate the moisture absorption behavior of uncompatibilized and compatibilized palm fiber/polypropylene composites in distilled water and sea water. The amount of moisture absorbed at saturation by polypropylene during immersion in both environments increased significantly by in…
This paper demonstrates modeling of the busbars and the magnetic field in an aluminum reduction cell. The methodology presented is focused on a series of fast and effective numerical calculations, where in the initial state the busbars of the reduction cell are represented by an equivalent resistance network. The anal…
This paper presents analysis and measurement results of a high-frequency (HF) coaxial transformer with Faraday shield. The simulation results demonstrate that the magnetic flux and eddy current distribution are not impacted by the inclusion of a Faraday shield. The Faraday shield's maximum eddy current density is less…
Abstract Single crystals of L‐histidinium tetrafluoroborate (L‐HFB) were grown by slow evaporation of an aqueous solution at room temperature. The crystal structure has been elucidated through single crystal X‐ray crystallography. The infrared (IR) and Raman spectroscopic measurements fully confirm the X‐ray crystal s…