Materials Literature
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We report first-principles calculations of the energetics and simulated scanning tunneling microscopy (STM) images for Mn dopants near the GaAs (110) surface, and compare the results with cross-sectional STM images. The Mn configurations considered here include substitutionals, interstitials, and complexes of substitu…
We have derived the integral form of the cusp and node coalescence conditions satisfied by the wavefunction at the coalescence of two charged particles in $D \geq 2$ dimension space. From it we have obtained the differential form of the coalescence conditions. These expressions reduce to the well-known integral and di…
In this paper I study a model for a growing surface in the presence of anomalous diffusion, also known as the Fractal Kardar-Parisi-Zhang equation (FKPZ). This equation includes a fractional Laplacian that accounts for the possibility that surface transport is caused by a hopping mechanism of a Levy flight. I show tha…
Exfoliated nanocomposites (PE-g-MA/MgAl-LDH) were synthesized by solution intercalation of polyethylene-grafted-maleic anhydride (PE-g-MA) into the galleries of organo-modified MgAl layered double hydroxide (OMgAl-LDH) under reflux in xylene. Their structural elucidation and thermal characterization were carried out b…
This review focuses on the electrosynthesis, in situ characterization, and technological applications of Prussian blue analogues with the generic formula A h M k [Fe(CN) 6 ] l · m H 2 O, where h, k, l, and m are stoichiometric numbers, A = alkali metal cation, and M is a transition metal. Six such metal hexacyanoferra…
Integrin-mediated cell adhesion to proteins adsorbed onto synthetic surfaces anchors cells and triggers signals that direct cell function. In the case of fibronectin (Fn), adsorption onto substrates of varying properties alters its conformation/structure and its ability to support cell adhesion. In the present study,…
Electrospinning has been applied to prepare uniaxially aligned nanofibers made of organic polymers, ceramics, and polymer/ceramic composites. The key to the success of this method was the use of a collector consisting of two pieces of electrically conductive substrates separated by a gap whose width could be varied fr…
Traditional analysis of reactions catalyzed by supported metals involves the structure of the metallic particles. However, we report here that for the class of nanostructured gold- or platinum-cerium oxide catalysts, which are active for the water-gas shift reaction, metal nanoparticles do not participate in the react…
Abstract This method shows the superiority of designing DWDM filters by using the idea of simulated annealing algorithm. By applying this method, the spectral transmittance and reflectance curves of these filters all effectively achieve their desired optical performances. Although the design procedure is concentrated…
We report muon spin rotation measurements of the local magnetic susceptibility around a positive muon in the paramagnetic state of the quasi-one-dimensional spin 1/2 antiferromagnet dichlorobis (pyridine) copper (II). Signals from three distinct sites are resolved and have a temperature dependent frequency shift which…
Nonlinear optic (NLO) polymer based electro-optic devices have been achieving world record low half wave voltages and high frequencies over the last 2-3 years. Part of the advancement is through the use of relatively more conductive polymers for the cladding layers. Based on the current materials available for these c…
Abstract Magnetic composite nanoparticle of Au/γ-Fe2O3 was synthesized in an aqueous phase using gamma-ray. Connection between gold and γ-Fe2O3 was confirmed by the magnetic separation technique. TEM observation shows that 5-nm gold particles were dispersed on 20-nm γ-Fe2O3 particles. The nanoparticles adsorbed a wate…
Abstract A series of α,ω-bis(meso-porphyrinyl)oligoacetylenes were systematically prepared. The exciton interaction between the porphyrins gradually decreased with increasing number of acetylenes, whereas the interaction between the porphyrin and the oligoacetylene unit appeared.
This paper reviews the role of alloying elements in aluminium and alloy fabrication on performance during surface treatment and surface finishing. Such elements may be present in solid solution as fine segregates, strengthening phase and equilibrium phases. For surface treatment and finishes, which generally proceed i…
This paper deals with single-step, orientation-selective immobilization of human erythrocyte membranes on bare silica beads with different topographies: 1) solid (nonporous) silica beads with a diameter of 3 microns and 2) porous silica beads with a diameter of 5 microns. Erythrocyte membranes were immobilized onto be…
We present coupled cluster ab initio calculations for the Mg–He and Ca–He van der Waals potential energy curves. Our calculations employ large atom-centred basis sets, diffuse interbond functions and a fully iterative treatment of single, double and triple excitations in the coupled cluster calculation, and also inclu…
Measurements of the specific heat on the system ${\mathrm{Ca}}_{x}{\mathrm{MnO}}_{3}(x<~0.10)$ are reported. Particular attention is paid to the effect that doping the parent compound with electrons by substitution of La for Ca has on the magnetic ground state. The high- $(T>40$ K) temperature data reveal that d…
Abstract Surface‐wave propagation along a metamaterial slab with negative permittivity and permeability is analyzed. The dispersion relations are determined for the TM and TE (odd and even) modes. The Brillouin diagrams are drawn and show that, for odd modes after cutoff, there is an initial frequency range for which…
Abstract Liquid‐crystalline (LC) polyesters based on hexanediol or butanediol, dimethyl 4,4′‐biphenyldicarboxylate, and a sugar‐based diol, isosorbide or isomanide, were prepared with conventional melt polymerization. 1 H NMR spectroscopy confirmed that 50 mol % of the charged sugar diol was successfully incorporated…
Density-functional methods are used to analyze the scaling of discrete oligomeric \ensuremath{\pi}-electron conducting molecules towards idealized isolated polymer chains, treated in periodic boundary conditions. The band gaps of a series of conjugated oligomers of incrementally increasing lengths exactly fit a nearly…