Tarasenka Natalie, Kornev Vladislav, Nevar Alena, Tarasenko Nikolai
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, 220072 Minsk, Belarus.
Department of Design, Manufacturing and Engineering Management, University of Strathclyde, Glasgow, UK.
Beilstein J Nanotechnol. 2025 Sep 4;16:1533-1544. doi: 10.3762/bjnano.16.108. eCollection 2025.
In this study, silicon nanoparticles (NPs) were produced by pulsed laser ablation in a liquid, aiming to investigate the influence of a laser beam profile on the properties of the resultant NPs. Morphology, inner structure, and phase composition of the formed NPs were characterized by means of ultraviolet-visible spectroscopy, high-resolution transmission electron microscopy, and Raman and photoluminescence spectroscopies, and the correlation of the NP properties with the laser beam profile was studied. Three different beam profiles were selected, namely, a Bessel beam produced using an axicon, an annular profile formed using a combination of an axicon and a converging lens, and a Gaussian beam focused on the surface of a Si target using the same converging lens. In all the schemes, a nanosecond Nd:YAG laser with a pulse duration of 10 ns operating at its fundamental harmonic (1064 nm) was used as an ablation source. The beam profile has been shown to be a crucial factor significantly influencing morphology and composition of the nanostructures produced. Namely, the conditions generated using a Bessel beam profile favored the production of nanostructures having elongated filament-like morphology. The synthesized colloidal Si NPs are suggested for applications as a component of electrode materials in supercapacitors and batteries.
在本研究中，通过液体中的脉冲激光烧蚀制备了硅纳米颗粒（NPs），旨在研究激光束轮廓对所得纳米颗粒性质的影响。通过紫外可见光谱、高分辨率透射电子显微镜以及拉曼光谱和光致发光光谱对所形成纳米颗粒的形态、内部结构和相组成进行了表征，并研究了纳米颗粒性质与激光束轮廓之间的相关性。选择了三种不同的光束轮廓，即使用轴棱锥产生的贝塞尔光束、使用轴棱锥和会聚透镜组合形成的环形轮廓以及使用相同会聚透镜聚焦在硅靶表面的高斯光束。在所有方案中，均使用脉冲持续时间为10 ns、基频（1064 nm）运行的纳秒级Nd:YAG激光器作为烧蚀源。结果表明，光束轮廓是显著影响所制备纳米结构形态和组成的关键因素。具体而言，使用贝塞尔光束轮廓产生的条件有利于制备具有细长丝状形态的纳米结构。合成的胶体硅纳米颗粒被建议用作超级电容器和电池中电极材料的组分。
