In-flow laser modification of silver nanoparticles synthesized by spark discharge

Condensed matter physics

Silver nanoparticles have unique optical properties due to surface plasmon resonance, so they are widely used in various fields of science and technology. The synthesis of aerosol nanoparticles using a spark discharge allows to  obtain submicron fractal agglomerated nanoparticles. For future application there is a need to develop new methods to produce nanoparticles with different shapes and sizes to control their optical properties. The article was devoted  to the study of the processes of interaction of nanosecond laser radiation of different power (0.230 and 460 MW) and wavelength (527 and 1054 nm) with the flow of aerosol agglomerates of silver nanoparticles (10-400 ml/min)  synthesized in a spark discharge, and the assessment of the effect of pulsed radiation power on the morphology of silver nanoparticles. It was shown that best modification of silver nanoparticles to spherical shape was formed at the
maximum laser radiation power of the wavelength of 527 nm, close to the plasmon resonance peak for silver.