Investigation of the influence of gold nanoparticles on stimulated luminescence of phenylamine 160 in ethanol

Abstract

Investigations of the influence nanoparticles of gold on the properties of stimulated emission of phenylamine 160 in ethanol were carried out. Au nanoparticle ablation gold targets were obtained in standard second harmonic solid laser ND. The concentration of the nanoparticles Au was deyermined to change yhe mass of the target before and after ablation and amounted to 5*10-3 mol/l within 30 minutes ablation. The average size Au nanoparticles were determined by dynamic light scattering in sub-micron particles size analyzer Zetasizer Nano ZS. Measurements showed that the investigated wednesday the average size of nanoparticles is 80 nm. Nanoparticles of gold were obtained by laser ablation of a gold target in ethanol. The concentration of nanoparticles was determined from the change in the mass of the target before and after ablation. It is established that when 160 nanoparticles of gold are added to the phenylamine solution, an increase in laser radiation intensity of 1.4 times and a narrowing of the lasing band is observed 1.5 times. The generation intensity reaches a maximum value at a concentration of gold nanoparticles CAu = 10-4 mol/l. Given the kinetics of the luminescence of solutions F160 in ethanol in the presence of gold nanoparticles. It is shown that pulse
generation does not exceed the duration of the pump pulse and is τген~of 7.4 NS. When added to a solution of gold nanoparticles SAI = 10-4 mol/l there is a reduction of the pulse duration generating τ~6.7 NS. The threshold for the onset of stimulated emission is reduced by a factor of 2.2. The duration of the generation pulse decreases 1.1 times.