Papers – Page 633 – TechConnect Briefs

A Study about Surface Chemical-Physics Mechanisms Occurring for Interacting Metal Nanostructures / gas NO2

di Stasio S., Dal Santo V., National Research Council of Italy (CNR), IT

Zinc nanostructures synthesized with different morphologies from the same evaporation/condensation technique are studied with concern to surface reactivity to NO2 by Diffuse Reflectance Infrared Fourier Transformed Spectroscopy (DRIFTS). Synthesis of nanopowders is obtained, according to [...]

Maintaining Clean Surfaces in Cryogenic Measurement Environments

Lindemuth J., Lake Shore Cryogenics, US

Surfaces of nanoscale materials of all types must be kept clean to properly characterize their behavior. Materials that are characterized at cryogenic temperatures and in vacuum present additional challenges to maintaining clean surfaces. Any residual [...]

Effect of thermal treatments on the structure of photoactive titanium oxides

Diamanti M.V., Codeluppi S., Cordioli A., Pedeferri MP., Politecnico di Milano, IT

Nanocrystalline TiO2 is one of the most important and used photocatalysts because of the excellent efficiencies of conversion of chemical species, and its chemical stability. Its photocatalytic properties are activated only by UV light; nevertheless, [...]

Effects of the Shape of Nanoparticles on the Crystallization Behavior of Poly(ethylene terephthalate) Nanocomposites in the Flow Fields

Kim B.C., Jang K.H., Hahm W.G., Kikutani T., Lee J., Hanyang University, KR

This paper investigated the effects of the shape of nanoparticles on the crystallization behavior of high molecular weight poly(ethylene terephthalate) (PET ; inherent viscosity of 0.98 g/dl) in the shear and elongational flow fields. Two [...]

Deposition and Characterization of Platinum Nanoparticles on Highly Orientated Pyrolytic Graphite

Elizondo-Villarreal N., Novar C., Zhou J.P., Alvarez Contreras L., Tel Vered R., Universidad Autonoma de Nuevo Leon, MX

Platinum is considered one of the best electrocatalyst for low temperature reactions in a H2/O2 fuel cell. Metallic nanoparticles are of great interest because of the modification of properties observed due to size effects, modifying [...]

Shape-Controlled Synthesis and Catalytic Behavior of Supported Platinum Nanoparticles

Liu C., Fransson M., Zhou B., Headwaters Technology Innovation LLC, US

Shape-Controlled Synthesis and Catalytic Behavior of Supported Platinum Nanoparticles Selective hydrogenation reaction is influenced by many factors, which include the presence of catalytic activators or poisons, the temperature, pressure, solvent agitation and other conditions specific [...]

Comparative Study Of Effect Of Various Reducing Agents On Size And Shapes Of Gold Nanoparticles

Kumar A., Dhawan N., Stanford University, US

Nanoparticles have attracted considerable interest because of their unique optical, electromagnetic and catalytic properties that differ from bulk ones. The origin of these properties is their large surface to volume ratio and from the coherent [...]

Biologically synthesised Silver nanoparticles using a Bacterial Culture Isolated from the riverine bank of Ganges in India

Ahmad N., Sharma S., Ghosh A.K., Reader, IN

Nanotechnology is a highly energized discipline of science and technology. One of the major challenges of nanotechnology is the synthesis of nanomaterials with a wide range of chemical compositions and sizes. Nanobiotechnology is a promising [...]

Synthesis and Characterization of Nanocrystalline Eu3+-doped Gd2O3

Jáuregui-Rosas S., Tomar M., Jia W., Vásquez O., Fachini E., University of Puerto Rico, Mayaguez Campus, PR

Nanocrystalline Gd2-xEuxO3 phosphors by a simple sol-gel method have been synthesized. The effects of the annealing temperature and atomic fraction of Eu3+ ions (x) on the structural and luminescence properties of the mixed oxides have [...]

Magnetic Properties Of Iron-Filled Multiwalled Carbon Nanotubes

Aguiló-Aguayo N., García-Céspedes J., Pascual E., Bertran E., IN2UB, Universitat de Barcelona, ES

Magnetic properties of iron-filled multiwalled carbon nanotubes have been investigated. Hysteretic and temperature dependent magnetic responses reveal a superparamagnetic behaviour at temperatures below 150ºC. The saturation magnetization of the nanowires at 5K is found to [...]