The nucleation and growth of CdS nanoparticles were obtained by the thermolysis click here of a single Cd and S precursor dispersed in the polymer at three different temperatures of annealing: 240, 265, and 300 degrees C. In this way, it was possible to compare the properties of nanocomposites containing nanoparticles with different sizes. X-ray diffraction and transmission electron microscopy analyses confirmed the formation of

CdS nanoparticles and gave information about the size, distribution, and morphology of the nanoparticles; monodispersive and very small nanoparticles with diameters below 2.5 nm were obtained at 240 degrees C. The application of such nanocomposites as emitting layers in OLED devices is discussed. Enhanced electrooptical properties were observed for the device containing the nanocomposite annealed at 240 degrees C with respect to the pure polymer based device. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: 3624-3629, 2011″
“We use optical transient-grating spectroscopy to measure the spin diffusion of optically oriented electrons in bulk, semi-insulating GaAs(100). Trapping and recombination do not quickly deplete the photoexcited population. The spin diffusion learn more coefficient of 88+/-12 cm(2)/s is roughly constant at temperatures from 15 K to 150 K, and the spin diffusion length is at least 450 nm. We show that it

is possible to use spin diffusion to estimate the electron diffusion coefficient. Due

to electron-electron interactions, the electron diffusion is 1.4 times larger than the spin diffusion. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3592272]“
“Vagus nerve stimulation (VNS) is an established neurostimulation therapy used to treat refractory epilepsy. The effect of acute or chronic VNS on the postictal state as a separate entity is seldom reported in Selleckchem Proteasome inhibitor clinical or experimental studies. Apart from its antiseizure effects. VNS has several other beneficial effects. These effects may be of particular benefit for patients with postictal neuropsychiatric symptoms. The hypothesized mechanisms underlying the initiation and sustainment of the postictal phase, to some extent, overlap with mechanisms involved in the seizure-suppressing effects of VNS as well as other neurological and psychotropic effects of VNS. Both the clinical symptoms and the basic research hypotheses of the postictal state show similarities with clinical effects induced by VNS and its underlying mechanisms of action. (C) 2010 Elsevier Inc. All rights reserved.”
“We developed and characterized inks based on dispersions of N-doped titanium dioxide (TiO(2)) in polyethylenimine (PEI)/ethanol solutions with chemicophysical properties suitable for the ink-jet printing process. In detail, we prepared suspensions by varying the concentration of the polymeric dispersant to investigate the effect of the dispersant on the time stability and printability of the ink.