Regensburg 2025 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 77: Poster Vacuum Science Technology: Theory and Applications

O 77.1: Poster

Mittwoch, 19. März 2025, 18:00–20:00, P2

An apparatus of preparing frozen solution samples for ultra-high vacuum experiments — •Jiadong Guo, Xinmeng Liu, and Ying Jiang — International Center for Quantum Materials, School of Physics, Peking University, Beijing, China

Here we develop an apparatus for preparing frozen solution samples, which can be characterized by surface science techniques under ultra-high vacuum (UHV) condition. When a temperature-variable substrate is approached to contact the frozen solution at 77 K, the surface of the frozen solution is locally melted and then refreeze with the substrate. By detaching the substrate from the frozen solution in high vacuum, the frozen solution is cleaved and transferred onto the substrate. Applying this method, we demonstrate transferring NaCl and LiNO₃ frozen solutions onto the Au substrate, and directly image the crystallization of NaCl and LiNO₃ using atomically resolved atomic force microscopy (AFM) in UHV at 5 K.

This apparatus provides a new approach to transfer solution samples in their glassy states into the UHV environment while maintaining the cleanliness of the samples, laying the foundation for further research related to solution environment, such as crystallization, hydration, chemical reaction, materials synthesis and bioimaging.

Keywords: Apparatus; Sample Preparation; Scanning Probe Microscopy; Crystallization; Solution