Andrei Butsen

Laser-induced size and shape transformation of silver colloidal nanoparticles

In this paper studies of the changes of the morphology of silver colloidal nanoparticles under laser irradiation at different fluences and wavelengths have been presented. Silver nanoparticles of size 10-30 nm were prepared in a gelatin stabilized AgNO3 solution under reduction with K-Na-tartrate. They were then exposed to pulsed laser radiation at 532 nm, 400 nm and 266 nm. In addition to the fragmented particles, relatively larger-size (1400-1500 nm) rightangled structures were found to be formed in the solution. The experimental conditions favouring laser-induced transformation of the morphology of nanoparticles have been determined.

Laser ablation synthesis and optical characterization of zinc oxide nanostructures

Zinc oxide nanoparticles were synthesized by pulsed laser ablation technique in water with further deposition on the single-crystalline silicon substrate. The composition, morphology, absorbance and luminescent properties of the formed structures were studied. The study revealed that films of high structural and optical quality can be prepared by the developed method.