Production of copper nanoparticles in the process of target ablation by radiation Cr³⁺:BeAl₂O₄ laser

¹ Institute on Laser and Information Technologies of Russian Academy of Sciences — Branch of Federal Scientific Research Center “Crystallography and Photonics” of Russian Academy of Sciences, 140700 Shatura, Russia
² Vladimir state university named after Aleksandr Grigorevich and Nikolay Grigorevich Stoletov, 600000, Vladimir, Russia
³ Kovrov State Technological Academy named after V.A. Degtyarev, 601910, Kovrov, Russia

^* Corresponding author: ae_shepelev@mail.ru

Abstract

The work is devoted to the synthesis of nanoparticles in the process of ablation of a copper target in a liquid by repetitively pulsed laser radiation. It has been noted that nanomaterials based on certain metals have unique physical and chemical properties. This ensures their use in various applications. In particular, copper nanoparticles are successfully used in medicine and biochemistry. To carry out the synthesis of copper nanoparticles, a previously developed Cr³⁺:BeAl₂O₄ laser is used. The laser is based on a plane-parallel resonator with a dispersive prism. Using a prism, the radiation wavelength is smoothly adjusted. To carry out copper ablation, the laser generation wavelength was tuned to 740 nm. It has been shown that when a target is exposed to a microsecond laser pulse consisting of a train of short pulses, copper nanoparticles of various sizes are formed. Comparison of the results with the results of previous works shows that exposure of the target to radiation with a shorter wavelength, commensurate with the energy density of the train and similar spatial parameters leads to a decrease in the average size of the synthesized nanoparticles.