Materials Literature
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The exclusive ability of acoustic waves to probe the structural, mechanical and fluidic properties of foams may offer novel approaches to characterise the porous scaffolds employed in tissue engineering. Motivated by this we conduct a preliminary investigation into the acoustic properties of a typical biopolymer and t…
The inelastic x-ray scattering spectrum for phonons of $Δ_{1}$-symmetry including the CuO bond-stretching phonon dispersion is analyzed by a Lorentz fit in HgBa$_{2}$CuO$_{4}$ and Bi$_{2}$Sr$_{2}$CuO$_{6}$, respectively, using recently calculated phonon frequencies as input parameters. The resulting mode frequencies o…
A deep level transient spectroscopy (DLTS) study of defects created by low-fluence, low-energy ion implantation for development of ion-implanted silicon field-effect transistors for spin-dependent transport experiments is presented. Standard annealing strategies are considered to activate the implanted dopants and rep…
We present calculations of the exchange interactions and Curie temperatures in Cr-based pnictides and chalcogenides of the form $\text{Cr}X$, with $X=\text{As}$, Sb, S, Se, and Te, and the mixed alloys ${\text{CrAs}}_{50}{X}_{50}$, with $X=\text{Sb}$, S, Se, and Te. The calculations are performed for zinc blende struc…
An amorphous Se$_{0.80}$S$_{0.20}$ alloy produced by Mechanical Alloying was studied by Raman spectroscopy, x-ray diffraction, extended x-ray absorption fine structure (EXAFS) and optical absorption spectroscopy, and also through reverse Monte Carlo simulations of its total structure factor and EXAFS data. Its vibrati…
Motivated from recent experiments in kappa-(BEDT-TTF)_2Cu_2(CN)_3, dielectric and magnetic properties in a dimer-Mott insulator are studied. We derive the effective Hamiltonian where the number of electron per dimer is taken to be one. Charge and magnetic structures in finite temperature are obtained by using the mean…
We use a computationally efficient phase-field formulation [B. Echebarria, Phys. Rev. E 70, 061604 (2004)] to investigate the origin and dynamics of sidebranching in directional solidification for realistic parameters of a dilute alloy previously studied experimentally [M. Gorgelin and A. Pocheau, Phys. Rev. E 57, 318…
The in-plane resistivity $\ensuremath{\rho}$ and thermal conductivity $\ensuremath{\kappa}$ of the FeAs-based superconductor ${\mathrm{KFe}}_{2}{\mathrm{As}}_{2}$ single crystal were measured down to 50 mK. We observe non-Fermi-liquid behavior $\ensuremath{\rho}(T)\ensuremath{\sim}{T}^{1.5}$ at ${H}_{{c}_{2}}=5\text{…
Monodisperse Cu and Cu2O nanoparticles (NPs) are synthesized using tetradecylphosphonic acid as a capping agent. Dispersing the NPs in chloroform and hexane at room temperature results in the formation of hollow Cu2O NPs and Cu@Cu2O core/shell NPs, respectively. The monodisperse Cu2O NPs are used to fabricate hybrid s…
Fate, transport, and possible toxicity of cerium oxide nanoparticles (nanoceria, CeO(2)) are still unknown. In this study, seeds of alfalfa (Medicago sativa), corn (Zea mays), cucumber (Cucumis sativus), and tomato (Lycopersicon esculentum) were treated with nanoceria at 0-4000 mg L(-1). The cerium uptake and oxidatio…
Gold nanoparticles (AuNPs) are used in many applications; however, their interactions with cells and potential health risk(s) are not fully known. In this manuscript, we describe the interactions of AuNPs with human dermal fibroblasts and show that they can penetrate the plasma membrane and accumulate in large vacuole…
Nanoporous membranes containing monodisperse pores of 24 nm diameter are fabricated using poly(styrene-b-lactide) block copolymers to template the pore structure. A 4 mum thin film of the block copolymer is cast onto a microporous membrane that provides mechanical reinforcement; by casting the copolymer film from the…
We derive and validate a technique for predicting phonon dispersion relations and lifetimes from the atomic velocities in a crystal using the spectral energy density. This procedure, applied here to carbon nanotubes, incorporates the full anharmonicity of the atomic interactions into the lifetime and frequency predict…
The precipitates and hydrogen permeation behaviour were investigated in high strength low alloy steel produced by thermomechanical controlled processing with air/water cooling after finishing rolling, and the water cooled specimens were further tempered at various temperatures. Two types of precipitates have been foun…
For the first time, the efficiency of different surface pretreatment approaches prior to adhesive bonding of a fibreglass-reinforced epoxy vinyl ester thermoset composite has been investigated. It was found that grit-blasting generally had a negligible effect on the surface free energy (SFE) calculated using the Owens…
This article presents a 2D finite element analysis for a 66-kV, three-phase, three-core, cross-linked polyethylene power cable with and without three symmetrically arranged optical fiber sensors. The aim of this simulation is to investigate how the electric and magnetic fields and the eddy-current density distribution…
Abstract Vibrational spectroscopy data were used to gain insight into the possible locations of extra oxygen ions introduced into La 8+ x Sr 2− y (SiO 4 ) 6 O 2+δ compounds to raise their ionic conductivity. Perturbations observed in the Raman and infrared spectra of these compounds with increasing δ were explained by…
As a new simulation method, cellular automata (CA) approach had been used in a number of areas, including electrochemistry and corrosion science research. In this work, a probability CA model was developed to simulate the growth of metastable pits. The simulation imaged the morphology of the pit and calculated the tim…
We present the results of thermal conductivity measurements on bulk nanocrystalline 10 mol% yttria-stabilized zirconia (10 mol%) in the temperature range between 173 and 773 K. The samples studied in this work, with grain sizes from d = 17 nm to d ≈ 1 µm, were obtained by cold compaction and sintering of mechanically…
The effect of hydrodynamic interactions on the spreading of clusters of colloid particles in a quasi-one-dimensional channel is analyzed both experimentally and theoretically. An n-particle cluster spreading diffusion coefficient is defined, in terms of the displacement Deltax(t) in time t, by D(n)[triple bond]<[Sigma…