Materials Literature
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This work focuses on experimentally demonstrating the modification in diffusion kinetics, formation of holographic polymer dispersed liquid crystal gratings and an improvement in its electro optic response by doping them with multi-walled carbon nanotubes. Results indicate a faster rise and fall times which is attribu…
In the present work, the frequency and temperature dependant dielectric properties of (x) Co1.2-yMnyFe1.8O4 + (1−x) BaZr0.08Ti0.92O3 magnetoelectric composites were studied. The magnetostrictive (ferrite) phase, Co1.2-yMnyFe1.8O4 with y = 0.0 to 0.4 (CMFO) was synthesized by combustion route and the piezoelectric phas…
Magnetocaloric properties of antiferromagnetic RGa(2) (R = Ce, Pr, Nd, Dy, Ho and Er) compounds have been reported. These systems present an antiferromagnetic transition below 15 K and a field induced metamagnetic transition from the antiferromagnetic to ferromagnetic state. Our results show that the character of the…
In this work we report the stability of liquid crystalline phases of charged hard spherocylinders (CHSC) of aspect ratio L/σ=5 at low temperatures using NPT Monte Carlo computer simulations. Following the methodology used in previous work [C. Avendaño, A. Gil-Villegas, E. González-Tovar, J. Chem. Phys. 128, 044506 (20…
We presented an automatic method for detecting and tracking colloidal gold fiducial markers for alignment in electron tomography (ET). The second-order derivative of direction was used to detect a fiducial marker accurately. The detection was optimized to be selective to the size of fiducial markers. A preliminary tra…
It's a trap! A simple process based on reverse-phase layer-by-layer encapsulation can be used to produce surface-bound semipermeable microenclosures that can trap biomolecules. Biomolecules such as nucleic acids and proteins can be encapsulated whilst preserving their functionality. Electrophoresis can be used to crea…
We report on the effect of double doping (La2+ and Sm3+) in PZT lattices in thin film form, keeping La (mol%) fixed at 8 mol% [Pb0.92-x La 0.08 Smx(Zr0.65Ti0.35)O3: x = 0, 0.02, 0.04, 0.06, 0.08]. Both the cation substitutions are being substituted at A site only. The thin films were grown on Pt/Si<111> substrates by…
Here we are reporting influence of Nd substitution on properties of Zr modified BaTiO3 [(BaZrxTi1-xO3), BZT5)]. The composition Ba1-xNdx(Zr0.05Ti0.95)O3 (x = 0–0.04) was prepared by conventional solid state reaction route. The sintered sample was characterized for its structural properties by XRD and Raman analysis. T…
Y 2 O 3 :Er 3 + nanocrystals codoped with Li + ions were synthesized by the glycine combustion method. Codoping with Li + ions leads to an enhancement of at most 19 times in the photoluminescence (PL) intensity around 1.5 µm, in terms of the increased lifetimes in the intermediate 4 I 13/2 of the Er 3 + state from 3.1…
The reaction of polyoxometalate anion [GeW11O39]8− with the complex anion [MoV2O4(H2O)2(ox)2]2− in the presence of CuCl2·2H2O and DMF (DMF = N,N-dimethyl formamide) at 85 °C in aqueous solution produces both a two-dimensional heteropoly blue H2[α-GeW10MoV2O40][Cu(DMF)3H2O]2·5H2O (1) and a three-dimensional heteropoly…
This critical overview proposes a new concept, a charge-by-charge assembly, which consists of alternately stacked positively and negatively charged species, by introducing examples of planar anionic structures in the solid state. The preparation of planar organic anions is not easy; however, complexation of planar ani…
The conversion of cis-2-butene with deuterium over a well-defined Pd/Fe(3)O(4) model catalyst was studied by isothermal pulsed molecular beam (MB) experiments under ultra high vacuum conditions. This study focuses on the processes related to dissociative hydrogen adsorption and diffusion into the subsurface of Pd nano…
The development of imaging and therapeutic agents against neuronal targets is hampered by the limited access of probes into the central nervous system across the blood-brain barrier (BBB). The evaluation of drug penetration into the brain in experimental models often requires complex procedures, including drug radiola…
Abstract The present work deals with two essential degradation mechanisms of zirconium alloys: Hydrogen behavior and microstructural transformations due to neutron irradiation. The studies were carried out by using samples taken from Zircaloy-4 components, which remained for 14 years in the Atucha I pressurized heavy…
Enrichment in metallic nickel below the passive film on a stainless steel was quantified using the novel HIgh Kinetic Energy Photo-Electron Spectroscopy technique. Two surfaces were tested: one passivated in air and one polarized to the mid passive region in . Primary beam energies ranging from were used to determine…
The development of NMR techniques applied in the last 10 years to partially oriented systems, and in particular to liquid crystals (LCs), is the object of this brief perspective. The evolution of NMR methods (i.e., new NMR pulse sequences) and the improvement of both theoretical models and mathematic tools for the ana…
We use the Cahn-Hilliard approach to model the slow dissolution dynamics of binary mixtures. An important peculiarity of the Cahn-Hilliard-Navier-Stokes equations is the necessity to use the full continuity equation even for a binary mixture of two incompressible liquids due to dependence of mixture density on concent…
Bimetallic 15 nm Pd-core Rh-shell Rh1−x Pd x nanoparticle catalysts have been synthesized and studied in CO oxidation by NO. The catalysts exhibited composition-dependent activity enhancement (synergy) in CO oxidation in high NO pressures. The observed synergetic effect is attributed to the favorable adsorption of CO…
Monte Carlo simulations are used to model the self-organizing behavior of the biomineralizing peptide KSL (KKVVFKVKFK) in the presence of phosphate. Originally identified as an antimicrobial peptide, KSL also directs the formation of biosilica through a hypothetical supramolecular template that requires phosphate for…
Polyvinyl acetate (PVAc) is considered to be a type of environmental friendly adhesive, and montmorillonite (MMT) is a cheap and accessible natural nanomineral. MMT was first organically activated by dioctadecyl dimethyl ammonium bromide (DOAB). The intercalated nanocomposite of MMT-DOAB was added during the synthesis…