SAMOP 2023 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 20: Poster III

MO 20.17: Poster

Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof

Control of (bio-) nanoparticles with external fields — •Jingxuan He1,2,3, Lena Worbs1,2, Jannik Lübke1,2,3, Surya Kiran Peravali1,4, Armando D. Estillore1, Amit K. Samanta1,3, and Jochen Küpper1,2,31Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 2Department of Physics, Universität Hamburg, Germany — 3Center for Ultrafast Imaging, Universität Hamburg, Germany — 4Fakultät für Maschinenbau, Helmut-Schmidt-Universität,Germany

Unraveling the elementary steps of biological processes and chemical reactions is a long-time goal of the scientific community. By using x-ray single-particle diffractive imaging, we can investigate the three-dimensional molecular structure of individual nanoparticles at atomic resolution through reconstructing a series of two-dimensional diffraction patterns [1]. However, because of the typically low signal-to-noise ratio, this requires the collection of a large amount of individual diffraction patterns. Since every intercepted particle is destroyed by the intense x-ray pulse, a new and preferably identical sample particle has to be delivered to every pulse. Here, we present an approach to prepare dense beams of cold and controlled nanoparticles and macromolecules with buffer-gas-cell-cooling and aerodynamic-focusing techniques. Besides, we demonstrated several control mechanisms with external fields that can help to realize a stream of pure, identical particles. We also showed that the particles’ arbitrary orientation in space can be controlled by applying laser alignment.

[1] M. M. Seibert, et al., Nature 470, 78 (2011)

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