Kinetics issues of CuBr lasers with added hydrogen

A computational kinetics model of the CuBr laser with added hydrogen is presented. The space-time behaviour of the lasers and lasants is described in detail. Besides the discharge field, it is confirmed that the dissociation/recombination of the CuBr molecule plays an important role in the plasma electron temperature. The radial field, which peaks at 30% of the discharge field and has two opposite directions along the radius, results in the skin of electron density and the black centre of the large-bore laser beam.     

One-step preparation of highly concentrated well-stable gold colloids by direct mix of polyelectrolyte and HAuCl4 aqueous solutions at room temperature

Highly concentrated, well-stable gold colloids can be prepared directly from an amine-bearing polyelectrolyte-HAuCl4 aqueous solution at room temperature. It is found that increasing molar ratio of polyelectrolyte to gold leads to increasing particle size. UV-vis spectra, transmission electron microscopy (TEM), and X-ray photoelectron spectra (XPS) were used to characterize the products thus formed.     

An example of applications of the elementary catastrophe theory in Hamiltonian systems

The convection in atmosphere discussed in ref. [1] is rigorously treated by considering the variation of environmental temperature with the height. This represents an example of applications of the elementary catastrophe theory in Hamiltonian systems.