Laser surface melting is known to alter surface energy and wettability of a few engineering materials, but its effect on magnesium alloys has never been reported. Effort was made to study how Nd:YAG laser irradiation influenced surface energy of an AZ91D magnesium alloy. Contact angle...

In the traditional egress model based on cellular automata, building spaces are divided into discrete grids, the size of which is usually as large as that of a pedestrian. In order to explore the influences of the grid size on the evacuation results, we studied the evacuation process using a...

TiO2 film deposited on glass was irradiated in air with single-shot KrF excimer laser pulse. The surface roughened as the result of the laser ablation. It is further noted that single-pulse irradiation with fluence ranging from 400 to 1200 mJ/cm2 gave rise to protrusion of the irradiated surface...

Surface oxidation of Ti was carried out using KrF excimer laser in the presence of O2. Different colors were obtained by varying the number of laser pulses at the fixed laser fluence. X-ray photoelectron spectroscopy shows that the outmost surface is composed of TiO2 and the inner layer consists...

Silicon has been widely used to fabricate microfluidic devices due to the dominance of silicon microfabrication technologies available. In this paper, theoretical analyses are carried out to suggest suitable laser machining parameters to achieve required channel geometries. Based on the...

Porous silicon structures were observed in laser-assisted etching in a TMAH solution. The porous structures significantly increase the active surface areas and therefore are of great interest to the pharmaceutical and fine chemicals industry, in the areas of high throughput drug discovery,...