Materials Literature
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$\text{Ca}{({\text{BH}}_{4})}_{2}$ is an interesting candidate for high-density hydrogen storage since it contains a large amount of hydrogen by weight and volume, and has been shown to reversibly release and absorb hydrogen, albeit at moderately high temperatures. $\text{Ca}{({\text{BH}}_{4})}_{2}$ undergoes a polymo…
Polyurea microcapsules were prepared by sequential interfacial reaction of different aromatic and aliphatic isocyanates. The resulting composite capsule walls were studied using scanning transmission X-ray microscopy (STXM) to quantitatively map the distributions of the resulting aromatic and aliphatic polyureas acros…
FeCo magnetic nanoparticles (MNPs) have been investigated for curing polymer epoxy composites through radio-frequency (rf) heating. The rf response of functionalized FeCo MNPs is shown to uniformly cure the epoxy without parasitic heating for potential applications in electronic packaging. The FeCo/(Co,Fe)3O4 MNPs wer…
A simple method that allows selective positioning of nanoparticles into mesoporous monolayer or multilayer thin films is presented. This technique applies UV lithography in order to bring about in situ light-induced reduction of silver in templated cavities of TiO2. The nanoparticle lithography presented here provides…
Recently, it has been shown that Engelhard titanosilicate (ETS-10), a crystalline microporous titanosilicate, is an inverse-shape-selective photocatalyst. The main drawback in the extensive use of this material was its band gap value, located in the UV, that does not allow the use of solar light. In this work, we succ…
Composite microwave absorbers have been fabricated by Fe-filled carbon nanotubes (CNTs) and a W-type hexagonal ferrite. The microwave absorption of the absorbers can be tuned by matching the dielectric loss and the magnetic loss by changing the ratio of ferrite in the composites. The microwave absorbing properties of…
The combined application of polyethylene glycol and ultrasonic irradiation has been investigated as a possible method to synthesize intercalated Au/clay nanocomposites. Twenty minutes of ultrasonic irradiation on the Na + −montmorillonite clay matrix in the presence of polyethylene glycol suffices to introduce polymer…
Crystal structures of rare-earth gallium perovskites LaGaO(3), PrGaO(3), NdGaO(3) and Pr(1-x)Nd(x)GaO(3) (x = 0.25, 0.50, 0.75) solid solutions were investigated in the temperature range 12-300 K by high-resolution powder diffraction using synchrotron or neutron radiation. The previously reported negative thermal expa…
The deposition of model colloidal particles onto striped charge-heterogeneous surfaces was studied to determine the influence of surface chemical heterogeneity on the deposit morphology. The charge heterogeneity was created employing self-assembled monolayers of carboxyl- and amine-terminated alkanethiols using a soft…
Abstract This work describes a simple two‐step method for grafting thermoresponsive amine‐terminated poly(N‐isopropylacrylamide) brushes to thin films of freshly‐etched porous Si. Grafting is achieved by pre‐hydrosilylation of the hydride‐terminated porous Si with undecylenic acid. The end carboxyl groups are activate…
Abstract Two of the most important properties of a porous silicon multilayer for photonic applications are flat interfaces and a relative large refractive index contrast between layers in the optical wavelength range. In this work, we studied the effect of the current density and HF electrolyte concentration on the re…
This letter describes a novel approach for developing organogelators through the formation of reversible imine bonds from two molecular components and the enriching behavior of the gelating imines. Cholesterol-appended aniline 1 and 4-substituted benzaldehydes 2a-d did not gelate any solvents. Their condensation produ…
Periodic cellular metals with open, periodic cell topologies have received much attention owing to their potential for multi-functionality such as load bearing, thermal dissipation, and actuation. Recently, a new technique, known as wire-woven bulk Kagome, has been introduced, which is used for fabricating multi-layer…
This work presents a simple way of estimating uniaxial tensile strength on the basis of theoretical shear strength calculations, taking into account its dependence on a superimposed normal stress. The presented procedure enables us to avoid complicated and time-consuming analyses of elastic stability of crystals under…
The basic idea of fast off-lattice Monte Carlo (FOMC) simulations is to use "soft" repulsive potentials that allow particle overlapping in continuum Monte Carlo (MC) simulations. For multichain systems, this gives much faster chain relaxation and better sampling of the configurational space than conventional molecular…
We calculate the effective Coulomb repulsion between electrons/holes U(m) ((v)) and site energy for an isolated bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) molecule in vacuo. U(m) ((v))=4.2+/-0.1 eV for 44 experimental geometries taken from a broad range of conformations, polymorphs, anions, temperatures, and pre…
Abstract We present an approach for the optimization of thin film antireflective coatings for encapsulated planar silicon solar cells in which the variations in the incident spectra and angle of incidence (AOI) over a typical day are fully considered. Both the angular and wavelength dependences of the reflectance from…
The paper presents results of a study on obtaining N-enriched active carbons from four hard coals with different degree of metamorphism. The starting materials were carbonized, activated with KOH, and ammoxidized by a mixture of ammonia and air at the ratio 1:3 at 300 and 350 °C, at each stage of the active carbon pro…
An effective three-photon IR quantum cutting excited by visible light used for solar cells, which has attracted broad attention of academia recently, is reported for the first time (to our knowledge). It is based on a single species of rare-earth Er3+ ion of Er0.3Gd0.7VO4 crystalline. It was found that the approximate…
A series of novel polyelectrolyte-amphiphilie complexes were prepared by ionic self-assembly of cationic linear poly(ferrocenylsilane) (PFS) of [Fe(η-C 5 H 4 ) 2 SiMe(OCH 2 CH 2 NMe 3 I)] n ( PFS ) with anionic dendrons of 3,4,5-tris( n -alkan-1-yloxy)benzoic acid [ (3,4,5) n G1-COOK, n = 12, 14, 16, where n was the n…