Materials Literature
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We report photoluminescence measurements carried out on amorphous ${\text{SiO}}_{2}$ upon excitation by synchrotron light. Exposure of the as-grown material to above-edge light at low temperature induces the formation of nonbridging oxygen hole centers (NBOHC), localized in a thin layer below the surface limited by th…
The interphase layer of polymers adsorbed to silica surfaces can be affected by the surface silanol density as well as the relative size of the polymer compared with the size of the adsorbing substrate. Here, the nonequilibrium adsorption of PMMA onto individual colloidal Stober silica (SiO(2)) particles, where R(part…
A new optical probe in catalysis: The detection of the surface coverage of reactants on the surface of nanosized catalysts by manipulating nanoscale LSPR optical probes, as demonstrated by Larsson and co-workers, opens up new avenues for in situ investigation of the kinetics and mechanism of heterogeneous catalytic re…
Abstract Plasma‐induced graft polymerization of acrylic acid onto polypropylene monofilament was carried out to introduce carboxyl groups on its surface. The monofilament was treated with oxygen plasma to create hydroperoxide groups and subsequent graft polymerization of acrylic acid on exposed filament was carried ou…
Abstract Poly(lactic acid) (PLA) toughening is often associated with significant modulus and/or strength losses making it unsuitable for many consumer and biomedical applications. The major objective of this research was to toughen PLA without significant loss in modulus and strength and to introduce reactive acid gro…
Spark plasma sintered 3Y-TZP has been investigated with respect to hydrothermal ageing and grinding. The sintering was performed between the temperatures of 1,100 and 1,600 °C for a soaking time of 5 minutes and the resulting materials were obtained with grain sizes between 65 to 800 nm and relative densities between…
Superlattice structures (SLSs) assembled with cube-shaped EuS nanocrystals (NCs) and their remarkable magnetic properties are reported. The cube-shaped EuS NCs are prepared by the thermal reduction of single source precursor, tetra(diethyldithiocarbamate) europium complex with oleylamine as a surface modified regent.…
Cross links between inner and outer walls of multiwalled carbon nanotubes are believed to increase nanotube modulus and therefore nanotube effectiveness for reinforcing composites. In order to investigate changes in the Young's modulus of individual double-walled nanotubes (DWNTs) as a function of cross-link density a…
Highly monodisperse PbS colloidal nanocrystal clusters with well controllable size and size distribution, high crystallinity and high water solubility have been successfully synthesized through a modified polyol process. Thiourea stock solution was rapidly injected into diethyene glycol solution containing lead precur…
We demonstrate a controllable viewing angle liquid crystal display (LCD) using an inserted blue-phase liquid crystal (BPLC) cell. The BPLC layer functions as a tunable positive C-film or a negative C-film, depending on whether the employed LC has a positive or negative dielectric anisotropy. Therefore, the viewing ang…
We introduce a new direction of research in electrooptics: electrovariable nanoplasmonics. As a specific example, we focus on a new approach for electrically tunable reflection of light at a liquid−liquid interface, suggested and described in this work. Its operation principle relies on voltage controlled localization…
Abstract This work was aimed to study the effect of natural polyphenols extract ( Acacia nilotica bark) on physicochemical properties of crosslinked gelatin‐poly(acrylamide‐ co ‐acrylic acid), Gel‐poly(AAm‐ co ‐Ac), polymeric biocomposite film. Gelatin‐based composite films have extensive application as biocompatible…
The mechanical cues that adherent cells derive from the extracellular matrix (ECM) can effect dramatic changes in cell migration, proliferation, differentiation, and apoptosis. Model ECMs composed of collagen fibrils formed from purified collagen are an important experimental system to study cell responses to mechanic…
Monomeric pyrrole-2-carbaldehyde (P2C) was isolated in low-temperature argon and xenon matrices, and its UV-induced photochemistry was studied. The structures of the reagent as well as the reaction photoproducts were characterized by FTIR spectroscopy. Interpretation of the experimental results was assisted by theoret…
Abstract The formation and swelling behavior of bacterial cellulose/acrylic acid hydrogel prepared from aqueous mixture consists of 20 : 80 (v/v) acrylic acid (AAc) and 1% bacterial cellulose dispersion under accelerated electron beam was investigated. Gel fraction of hydrogel increased with the increasing dose sugges…
We have employed mannose-modified gold nanodots (Man-Au NDs) as a luminescence sensor for the detection of the thyroid-cancer marker thyroglobulin (Tg) in homogeneous solutions. The luminescent Man-Au NDs are prepared through the reaction of 2.9 nm-diameter gold nanoparticles (Au NPs) with 11-mercapto-3,6,9-trioxaunde…
Fully pi-conjugated oligopyrromethene helices coiling two Cu(II) ions were obtained from oxidative cleavage of expanded porphyrins. The smoothly conjugated backbone structures, distinct near-IR absorption bands, and extended spin-density distributions demonstrated the effective pi-electron delocalization over the whol…
Addition of excess sterically stabilized P2VP latex to a colloidal dispersion of P2VP-silica nanocomposite particles (with silica shells at full monolayer coverage) leads to the facile redistribution of the silica nanoparticles such that partial coverage of all the P2VP latex particles is achieved. This silica exchang…
We developed a versatile numerical technique to compute the three-dimensional charge distribution inside plasmonic nanoparticles. This method can be easily applied to investigate the charge distribution inside arbitrarily complex plasmonic nanostructures and to identify the nature of the multipolar plasmon modes invol…
The synthesis and characterization of a new periodically ordered mesoporous organosilica material (PMO) containing aniline as a bridging organic building block is presented. Furthermore, the coordination of the vanadyl cation [VO] 2+ to the carboxy function of a second PMO material containing benzoic acid is described…