CC BY
4The 30th International Conference on Advanced Laser Technologies ALT'23
LM-O-1
Modeling of laser fragmentation of nanoparticles as wave process
P. S. Kuleshov 12, E. V. Barmina3, G. A. Shafeev3
1-P. I. Baranov Central Institute of Aviation Motors, Russia 2-Moscow Institute of Physics and Technology, Russia 3-Prokhorov General Physics Institute, Russian Academy of Sciences, Russia
barminaev@gmail.com
In this presentation we would like to familiarize our colleagues with current investigations of the development of NPs laser fragmentation model based on the theory of wave processes in soft matter. It is suggested that laser fragmentation of metallic nanoparticles in liquids leads to decrease of their size due to formation of capillary waves on the molten nanoparticle and their further interference with deformation waves. The dependencies of the size of secondary clusters and the degree of their size dispersion on the size of the initial nanoparticles are proposed. A minimal size of the initial particle which can be dispersed is determined. The necessary conditions for particle dispersion are formulated. The values of the most probable sizes of fragmentation particles and the dispersion of their size distributions are analytically obtained [1]. Experimental data on laser fragmentation of Au and Al [2,3] nanoparticles are corroborated by the derived model. We thank our industrial partner Pokkels LLC for providing innovative technical solutions.
[1] P. S. Kuleshov and V. D. Kobtsev, Distribution of aluminum clusters and their ignition in air during dispersion of aluminum nanoparticles in a shock wave, Combustion, Explosion, and Shock Waves, vol. 56(5), pp. 566-575, (2020).
[2] N. A. Kirichenko, I. A. Sukhov, G. A. Shafeev and M. E. Shcherbina, Evolution of the distribution function of Au nanoparticles in a liquid under the action of laser radiation, Quantum Electronics, vol. 42(2), p. 175, (2012).
[3] V.V. Smirnov, M.I. Zhilnikova, E.V. Barmina, G.A. Shafeev, V. D. Kobtsev, S. A. Kostritsa and S. M. Pridvorova, Chemical Physics Letters, vol. 763, p. 138211, (2021).
