Научная статья на тему 'Laser ablation and fragmentation of nanoparticles in liquid, electrostatic and magnetic fields'

Laser ablation and fragmentation of nanoparticles in liquid, electrostatic and magnetic fields Текст научной статьи по специальности «Нанотехнологии»

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Текст научной работы на тему «Laser ablation and fragmentation of nanoparticles in liquid, electrostatic and magnetic fields»

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ALT'23 The 30th International Conference on Advanced Laser Technologies

LD-O-10

Laser ablation and fragmentation of nanoparticles in liquid, electrostatic and magnetic fields

A. Chernikov, D. Kochuev, A. Voznesenskaya, R. Chkalov, D. Abramov, K. Khorkov

Institute of Applied Mathematics, Physics and Computer Science, Vladimir State University, Gorky Street, 87, 600000,

Vladimir, Russia

email address: khorkov@vlsu.ru

In this paper we present the results of various techniques for laser ablation and fragmentation of nanoparticles. Ablative synthesis was carried out on the developed experimental stands using liquid and gas media. During ablation in liquid media, the materials obtained were in the state of colloidal solutions. At the end of the ablation process, the target was removed from the resulting solution. If necessary, nanoparticles were selected, as well as fragmentation of the resulting material to achieve the necessary properties of the colloidal system (particle dispersion, chemical and phase composition) [1,2].

Materials obtained during ablation in a gas medium were deposited on the surface of the substrates under the action of an electrostatic or magnetic field [3]. To change the chemical composition of the compounds obtained, or to preserve the state of the initial substance, appropriate gas media were used, including with different percentages. The obtained nanoparticles MoS2, WS2, ZnS, ZnSe, AhO3, Ti, Fe, Fe2O3 were analyzed using electron microscopy, Raman spectroscopy, X-ray diffraction analysis and other methods. The experiments were carried out on a laser robotic complex based on the Yb:KGW femtosecond laser system (Avesta Ltd.), generating pulses with a duration of 280 fs at a wavelength of 1030 nm with a repetition frequency of 10 kHz and a maximum pulse energy of 150 J This complex has a modular structure, which allows the use of various additional nodes included in the optical schemes of exposure and processing of materials by femtosecond laser radiation.

A complex of studies of the physicochemical properties of nanoparticles allowed us to evaluate their characteristics such as shape and size, morphology and surface composition. The optical properties of the obtained colloidal solutions were investigated by spectrophotometry. The obtained data are necessary to make a decision on the most appropriate ways of using nanoparticles and possible adjustment of the parameters of the method of production. Schemes for photothermal response of synthesized colloidal solutions have been developed. The dependences of temperature change on time during irradiation of colloidal solutions, as well as the change in the transmission of laser radiation by colloidal solutions during irradiation are presented.

The study of the processes of formation of nanoparticles was carried out at the expense of the grant of the Russian Science Foundation No. 22-79-10348. Preparation and analysis of samples was carried out within the framework of the state assignment of the Ministry of Science and Higher Education of the Russian Federation, subject FZUN-2020-0013.

[1] Kurilova, U.E., Chernikov A.S., Kochuev D.A. et al., Physical and Biological Properties of Layers with Nanoparticles Based on Metal Chalcogenides and Titanium Synthesized by Femtosecond Laser Ablation and Fragmentation in Liquid, Journal of Biomedical Photonics & Engineering, vol., 9(2), 020301, (2023)

[2] Chernikov A.S., Tselikov G.I., Gubin M.Y. et al. Tunable optical properties of transition metal dichalcogenide nanoparticles synthesized by femtosecond laser ablation and fragmentation, Journal of Materials Chemistry C, vol. 11(10), pp. 3493-3503 (2023).

[3] Chernikov A.S., Kochuev D.A., Voznesenskaya A.A. et al. Synthesis of spherical zinc sulfide nanoparticles produced by femtosecond laser ablation and deposited on a silicon substrate under the action of an electrostatic field, Journal of Physics: Conference Series, vol. 2077(1), 012002 (2021).

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