Results obtained in a xerogel impregnated with CdS precursors after CW irradiation at 70 mW. (a) Photographs of the irradiated surface of the sample. (b) HRTEM image of a single CdS NP. (c) XRD patterns obtained from the laser-irradiated zone for different doping concentrations and (d) the particle size evolution deduced from the width of the reflex (110). (a, b, and c) adapted from .