Materials Literature
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Abstract CO disproportionation produces carbon deposits that cover active sites and induce catalyst deactivation. However, understanding of this detrimental reaction on reduced ceria is deficient. Herein, the reversibility and reaction mechanism of CO disproportionation on reduced ceria are investigated. The reversibi…
A neutral polyfluorene derivative that contains 20 mol% 2,1,3-benzothiadiazole (BT) is synthesized by Suzuki cross-coupling polymerization. A cationic conjugated polymer A and an alpha-mannose-bearing polymer B are subsequently obtained through different post-polymerization methods. As a result of the charged pendant…
Alloyed Zn x Ti y O z nanostructures were prepared by a thermal condensation process employing ethanolic mixtures of zinc acetate dihydrate and titanium alkoxide, without additional use of additives. It has been found that the nanocrystal growth takes place at temperatures above 350 °C yielding cubic spinel Zn 2 TiO 4…
Abstract We report a metal‐free bpy‐bridged silsesquioxane displaying an efficient and tuneable blue‐to‐green emission (maximum quantum yield and luminance values of 0.22 ± 0.02 cd m –2 and 63 ± 3 cd m –2 , respectively) when excited by commercial InGaN light emitting diodes (LEDs) (385–405 nm). This is the highest qu…
Abstract The power factors of bismuth telluride nanowires were determined. Large‐scale thermopower measurements of the nanowire arrays were performed under a constant thermal gradient. The local electrical resistance of individual nanowires inside alumina matrix was investigated at ambient conditions by a conductive t…
This work presents some results on the non-isothermal crystallization kinetics of a recycled polypropylene (RPP) and recycled polypropylene/short bamboo fiber (RPPSBF) composites by using the differential scanning calorimetry at four different cooling rates (5, 10, 20, 40°C/min). Ozawa, Avrami, Jeziorny, Kissinger mod…
The anomalous Hall effect of wires patterned from (Co{90}Fe{10}/Pt){n} multilayers, with 10<or=n<or=50, is used to determine the magnetization process in a small volume of maze domains. Time-independent 1/f noise appears in samples with a quality factor Q<1 at points on the hysteresis loop where the magnetization reve…
Abstract We separate 15 μm to 32 μm thick macroporous Si films from n‐type crystalline Si wafers by electrochemical etching under back‐side illumination. These layers are surface passivated and have openings in the oxide, for local doping and contacting, over 1% of the cell area. We measure effective lifetimes within…
Hydrogen chemisorption and diffusion on Pt and Pd decorated MoO 3 (010) surfaces were examined using periodic density functional methods. The deposition of Pt and Pd on MoO 3 was first carefully investigated. The strong metal−support interactions were found to greatly reduce the catalytic activity of Pt and Pd atoms a…
A fluorescent material with methylene viologen units bonded into the pore walls of the mesoporous MCM-48 silica is synthesized using the method of periodic mesoporous organosilicas with bridging groups (PMOs), in which the methylene viologen units are located within the channel walls through the cohydrolysis and cocon…
Abstract Up‐converting material, which can be efficiently excited by near infrared light and emit strong visible light through a process termed ‘up‐conversion fluorescence’, has shown a great potential for application in solar cells. In this paper, sodium yttrium fluoride (NaYF 4 ) up‐converting nanocrystals doped wit…
In this study, aerobic digestion of tannery industry wastewater was carried out using mixed culture obtained from common effluent treatment plant treating tannery wastewater. The effect of pH, temperature, inoculum concentration, agitation speed and initial substrate concentration on the reduction of organic matters w…
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…