Materials Literature
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The reversible height change dynamics of a poly(methacrylic acid) brush, a weak polyelectrolyte in response to pH changes, were observed using atomic force microscopy. The brush thickness could be repeatably and reversibly switched between 40 nm at pH 3 and 120 nm at pH 10.5. The swelling and collapse transitions took…
Abstract High surface area ZnO nanoparticles are synthesized by applying a novel continuous precipitation method using a micromixer coupled directly to a bench‐top spray dryer. The polycrystalline material is obtained by fast turbulent precipitation from aqueous zinc nitrate solutions with either sodium or potassium c…
The elaboration of organosilica-based hybrid monoliths exhibiting a hierarchically structured bimodal porous structure with chelating functionality have been synthesized under interplay between high internal phase emulsion (HIPE) and lyotropic mesophases. For the first time grafted Eu 3+ @ g β-diketone-Si(HIPE) and Eu…
The present paper reports the photophysical aspects of a very interesting and unique host-guest interaction between fullerene and phthalocyanines, viz., free base phthalocyanine (H2-Pc) and zinc-phthalocyanine (Zn-Pc), in toluene medium. Ground state electronic interaction between these two supramolecules has been evi…
Colloidal free-standing Cr 3+ -doped In 2 O 3 nanocrystals were synthesized in oleylamine from indium (III) and chromium (III) acetylacetonate precursors. The nanocrystals were treated with trioctylphosphine oxide to remove surface-bound dopant ions and ensure internal doping. The lattice resolved transmission electro…
Abstract Different configurations of CdS nanoparticles (NPs) are linked to Au electrodes by electropolymerization of thioaniline‐functionalized CdS NPs onto thioaniline‐functionalized Au‐electrodes. In one configuration, thioaniline‐functionalized CdS NPs are electropolymerized in the presence of thioanline‐modified A…
2,8-Di(4-trifluoromethylphenyl)-5,11-di-n-octylindolo[3,2-b]carbazole (2TFMPOIND) has been synthesised by a Suzuki coupling reaction. Single crystal microribbons of 2TFMPOIND are then fabricated by a solution assembly process. The microribbons have novel mechanical, optical, and electrical properties.
In this paper, we propose a general and powerful theory of the plasmonic enhancement of the many-body phenomena resulting in a closed expression for the surface plasmon-dressed Coulomb interaction. We illustrate this theory by computing the dressed interaction explicitly for an important example of metal–dielectric na…
In recent years, there has been considerable effort in designing improved delivery systems by including site-directed surface ligands to further enhance their selective targeting. The goal of this study is to engineer alpha5beta1-targeted stealth liposomes (nanoparticles covered with poly(ethylene glycol) (PEG)) that…
The solution behavior of a novel type of amphiphilic colloid, Janus discs, is explored in terms of their size. Small Janus discs can be individually dispersed in water, with a significant hydrophobic face exposed to water, whereas larger Janus discs undergo bending to stabilize and shield the hydrophobic face.
Sugar beet pulp (SBP), the residue from the sugar extraction process, contains abundant dietary fibers and is mainly used for feedstuff. In this study, poly(lactic acid) (PLA) and SBP composites were prepared using a twin screw extruder. The phase structure, thermal properties, mechanical properties, and water absorpt…
We report gas-phase production of metal oxide nanowires (NWs) and nanoparticles (NPs) using direct oxidation of micron-size metal particles in a high-throughput, atmospheric pressure microwave plasma jet reactor. We demonstrate the concept with production of SnO 2, ZnO, TiO 2, and Al 2 O 3 NWs. The results suggest tha…
In addition to a flow, plastic deformation of structural glasses (in particular amorphous silica) is characterized by a permanent densification. Raman spectroscopic estimators are shown to give a full account of the plastic behavior of silica under pressure. While the permanent densification of silica has been widely…
This article reports the facile synthesis of monodisperse polymer hollow spheres by seeded emulsion polymerization without additional treatment. In this method, P(St-MMA-MAA) copolymer latex particles were first prepared by emulsifier-free emulsion polymerization and then used as seeds to carry out emulsion polymeriza…
Abstract Left‐handed metamaterials (LHMs) composed of random dendritic cells demonstrate a multi‐band resonance and negative refractive index. A nano‐assembly approach is established to fabricate optical LHMs. Random nanostructures of silver dendritic cells are prepared and further fabricated into a sandwich‐like stru…
A series of cationic porphyrin-containing conjugated polyfluoreneethynylenes (PFEs) are synthesized for mercury(II) detection. The incorporation of porphyrin into the PFE backbone offers dual emissive polyelectrolytes with both blue and red emission bands resulting from incomplete intramolecular energy transfer from t…
We show that the chemical sensing responses of organic field-effect transistors based on nanostructured regioregular polythiophene are strongly dependent upon the gate biasing field. With different applied gate voltages, the source-drain current response can be different both in sign and magnitude for the same analyte…
Surface x-ray diffraction has been employed to elucidate the surface structure of the (011)-(2 x 1) termination of rutile TiO2. The data are inconsistent with previously proposed structures. Instead, an entirely unanticipated geometry emerges from the structure determination, which is terminated by zigzag rows of twof…
The early stage of graphene formation on the $6H\text{-SiC}(000\overline{1})$ surface is investigated by scanning tunneling microscopy. Islands made of a single graphitic plane form above regions of the substrate that show either a ${(2\ifmmode\times\else\texttimes\fi{}2)}_{\text{C}}$ or a $(3\ifmmode\times\else\textt…
The species composition of benthic diatoms was related to environmental conditions in streams throughout the western US to develop diatom traits, indicators for assessment of biological condition and indicators for diagnosing stressors. We hypothesized that indicators based on species traits determined for subsets of…