Papers – Page 70 – TechConnect Briefs

Electrical Properties of Functionalized Silicon Nanoparticles

Hartner S., Gupta A., Wiggers H., University Duisburg-Essen, DE

Phosphorous-doped as well as undoped Si-NPs with a mean particle diameter of about 50 nm were synthesized in a microwave plasma. The natural oxide was removed by etching the particles with hydrofluoric acid. In order [...]

The Mechanochemical Formation of Functionalized Semiconductor Nanoparticles for Electronic and Superhydrophobic Surface Applications

Mitchell B.S., Fink M.J., Tulane University, US

A rapid, direct and efficient method for the fabrication of functionalized semiconductor nanoparticles is described. The mechanochemical method involves the simultaneous top-down formation of nanoparticles using high energy ball milling (HEBM) and reaction with a [...]

Sol-gel Synthesis of Ferrite Foam Materials for H2 Generation from Water-Splitting Reaction

Bhosale R., Shende R., Puszynski J., South Dakota School of Mines & Technology, US

Ferrites in the form of spinel, doped spinel, and wustite are used for H2 generation from thermochemical water-splitting reaction. Although these ferrites have been synthesized by solid-state mixing, self-propagation high temperature synthesis and aerosol-spray pyrolysis [...]

Synthesis of Sulfated and Carbon-Coated Al2O3 Aerogels and Their Activity in Dehydrochlorination of 1-Chlorobutane and (2-Chloroethyl)ethyl Sulfide

Bedilo A.F., Volodin A.M., Klabunde K.J., Boreskov Institute of Catalysis, RU

Alumina is widely used as a sorbent and catalyst support. These applications typically require high surface area, stability in the used environment and often the presence of specific groups on the surface. Many of these [...]

Hydrothermal synthesis and Photoluminescent characterization of nanocrystalline BaZrO3

Diaz-Torres L.A., Salas P., Castaño V.M., Oliva J., De la Rosa E., Centro de Investigaciones en Optica A C, MX

Uniform well faceted sub-microcrystalline BaZrO3 particles have been obtained by a facile hydrothermal reaction. It is found that both morphology and photoluminescence properties depend on reaction time, complexation surfactant, solvent water to ethanol ratio, as [...]

In Situ Quick XAFS Study on the Formation Mechanism of Cu Nanoparticles Synthesized in Aqueous Phase

Nishimura S., Takagaki A., Maenosono S., Ebitani K., Japan Advanced Institute of Science and Technology, JP

The formation mechanism of copper nanoparticles (NPs) using poly(N-vinyl-2-pyrrolidone) (PVP) as a capping agent was investigated by measurements of X-ray diffraction (XRD), transmission electron microscopy (TEM), in situ time-resolved X-ray adsorption fine structure (XAFS) analysis, [...]

Au, Ag and Au-Ag nanoparticles: microwave-assisted synthesis in water and applications in ceramic and catalysis

Blosi M., Albonetti S., Gatti F., Dondi M., Migliori A., Ortolani L., Morandi V., Baldi G., Istec-CNR, IT

The research was focused on the synthesis of Au, Ag and Au-Ag core-shell sols, prepared by a patented microwave-assisted green synthesis. The method provides colloidal mono and bimetallic nanoparticles throughout the reduction of precursor’s salts [...]

The use of PEO-PPO-PEO block copolymers in the synthesis of nano ZnO via the hydrothermal method

Young M., Bao X., Loughborough University, UK

This investigation studied the effects of different molecular weight of the blocks in the PEO-PPO-PEO block copolymers, the different starting zinc compounds and different hydrothermal parameters on the particle size and morphology of ZnO. The [...]

Investigation of the stabilisation mechanism of small ZnO quantum dots below 20 nm

Segets D., Marczak R., Schäfer S., Peukert W., Friedrich-Alexander-University of Erlangen-Nuremberg, DE

ZnO semiconductor quantum dots have attracted considerable attention during the past ten years due to their promising electro-optical properties. Besides fundamental research on the particle synthesis itself, especially the nanoparticles optimization regarding electronic devices or [...]

Highly conducting nanosized monodispersed antimony-doped tin oxide particles synthesized via nonaqueous sol-gel method

Müller V., Rathousky J., Fattakhova-Rohlfing D., J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, CZ

Conducting antimony-doped tin oxide (ATO) nanoparticles were prepared by a nonaqueous solution route, using benzyl alcohol as both the oxygen source and the solvent, and tin tetrachloride and various Sb(III) and Sb(V) compounds as tin [...]