Momentum transfer to small particles by aloof electron beams

Details Momentum transfer to small particles by aloof electron beams Momentum transfer to small particles by aloof electron beams

2004-02-02

arxiv.org/abs/physics/0402005v1

Physical Review B 70, 115422 (2004)

Physics

Atomic and Molecular Clusters

Scientific paper

The force exerted on nanoparticles and atomic clusters by fast passing electrons like those employed in transmission electron microscopes are calculated and integrated over time to yield the momentum transferred from the electrons to the particles. Numerical results are offered for metallic and dielectric particles of different sizes (0-500 nm in diameter) as well as for carbon nanoclusters. Results for both linear and angular momentum transfers are presented. For the electron beam currents commonly employed in electron microscopes, the time-averaged forces are shown to be comparable in magnitude to laser-induced forces in optical tweezers. This opens up the possibility to study optically-trapped particles inside transmission electron microscopes.

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