Influence of laser beam profile on morphology and optical properties of silicon nanoparticles formed by laser ablation in liquid

• Natalie Tarasenka,
• Vladislav Kornev,
• Alena Nevar and
• Nikolai Tarasenko

Beilstein J. Nanotechnol. 2025, 16, 1533–1544, doi:10.3762/bjnano.16.108

• beam shaping can be considered as an important parameter in the optimization of Si NPs synthesis in terms of morphology control of the produced NPs and as a viable approach to expand laser ablation capabilities in the field of material processing. Nanocrystalline particles of silicon were synthesized

Size control of nanoparticles synthesized by pulsed laser ablation in liquids using donut-shaped beams

• Abdel Rahman Altakroury,
• Oleksandr Gatsa,
• Farbod Riahi,
• Zongwen Fu,
• Miroslava Flimelová,
• Andrei Samokhvalov,
• Stephan Barcikowski,
• Carlos Doñate-Buendía,
• Alexander V. Bulgakov and
• Bilal Gökce

Beilstein J. Nanotechnol. 2025, 16, 407–417, doi:10.3762/bjnano.16.31

• this pioneering study, further investigation with higher temporal and spatial resolution are warranted. Keywords: beam shaping; cavitation bubble; donut beam; gold nanoparticles; high-entropy alloy nanoparticles; nanoparticle size analysis; yttrium oxide nanoparticles; Introduction The demand for

• cases, the spatial profile of the laser beam employed was Gaussian. Here we propose to apply a novel approach of spatial beam shaping to modify the NP size distribution obtained by PLAL using a donut-shaped spatial beam profile. Donut-shaped laser beams, with and without orbital angular momentum, have

• , observing the pure effect of beam-shaping on the laser-induced cavitation bubble. In these experiments, the laser pulse energy was set to 400 µJ for both beams with identical focusing conditions. A telecentric telescope (Correctable T/1.5, Sill Optics, Germany) was used for magnification. To characterize

Fabrication of phase masks from amorphous carbon thin films for electron-beam shaping

• Lukas Grünewald,
• Dagmar Gerthsen and
• Simon Hettler

Beilstein J. Nanotechnol. 2019, 10, 1290–1302, doi:10.3762/bjnano.10.128

• Lukas Grunewald Dagmar Gerthsen Simon Hettler Laboratory for Electron Microscopy, Karlsruhe Institute of Technology (KIT), Engesserstrasse 7, 76131 Karlsruhe, Germany 10.3762/bjnano.10.128 Abstract Background: Electron-beam shaping opens up the possibility for novel imaging techniques in scanning

• ; Bessel beam; electron-beam shaping; nanofabrication; vortex beam; Introduction The possibility to shape electron beams has gained much interest since the first observation of electron vortex beams, i.e., beams that carry a defined orbital angular momentum [1][2][3]. Various other beam shapes, e.g., non

• modern (aberration-corrected) microscopes [11]. A range of different techniques has been developed to experimentally realize electron-beam shaping [12]. For example, special slit apertures [6][7] or nanoscale amplitude holograms [3] block specific parts of the incoming electron wave and generate the