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