СПЕКТРОСКОПИЧЕСКАЯ ДИАГНОСТИКА ДВУХИМПУЛЬСНОЙ ЛАЗЕРНОАБЛЯЦИОННОЙ ПЛАЗМЫ В ЖИДКОСТИ ДЛЯ ОПТИМИЗАЦИИ ПРОЦЕССА СИНТЕЗА НАНОЧАСТИЦ

The features of plasma formation in double-pulse laser ablation in liquid have been studied to optimize the process of nanoparticles synthesis. On the basis of spectroscopic plasma diagnostics the spatial structure and the time range of laserinduced plasma emission have been revealed and the composition of its component has been determined. Исследуются особенности плазмообразования при двухимпульсной лазерной абляции в жидкости с целью оптимизации процесса синтеза наночастиц. На основе спектроскопической диагностики выяснена пространственная структура и временной диапазон излучения лазерно-индуцированной плазмы, создаваемой под действием сдвоенных лазерных импульсов в жидкости, и определен ее компонентный состав.

On-Line Characterization of Gold Nanoparticles Generated by Laser Ablation in Liquids

AbstractSize of nanoparticles is an important parameter for their applications. To develop the system for the on-line nanoparticle characterization during their production by a laser, the laser ablation chamber that allows measurement of the surface plasmon resonance spectra during nanoparticle generation process has been designed and fabricated. The mean diameter of nanoparticles was determined using their absorption spectra acquired in the real-time during the ablation experiments. The results were compared with the TEM images analysis and observed differences in size are discussed. The technique was applied to investigate the effect of additional laser irradiation on size distribution in gold colloids prepared by laser ablation in water and in aqueous glucose solution

Formation of nanoparticles during double-pulse laser ablation of metals in liquids

Pulsed laser ablation of metal samples in liquid environments by using a combination of two laser beams has been examined in order to clarify a possibility of the formation of size-selected nanoparticles with controlled dimensions. It has been shown that double-pulse laser ablation technique in transparent liquids can be a good choice for fabrication of stable metal nanoparticles where an efficiency of ablation process can be increased and the wider range of a controllable variation of the mean diameter of the fabricated particles can be achieved