Regensburg 2025 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 27: Focus Session Chemical Imaging for the Elucidation of Molecular Structure I (joint session O/BP)
BP 27.5: Vortrag
Donnerstag, 20. März 2025, 16:45–17:00, H24
Low temperature multimode atomic force microscopy using an active MEMS cantilever — Michael G. Ruppert1, Miguel Wiche2, André Schirmeisen2, and •Daniel Ebeling2 — 1University of Technology Sydney, Australia — 2Justus Liebig University Giessen, Germany
Low-temperature atomic force microscopy (AFM) is one of the most powerful tools in surface science. With the chemical bond imaging technique, i.e., by using CO functionalized AFM tips, it became possible to visualize the chemical structure of individual organic molecules, which is essential for studying on-surface reactions and molecular manipulation processes. Routinely, such measurements are performed with qPlus sensors. Here, we present a proof of concept for an active microelectromechanical systems (MEMS) microcantilever with integrated piezoelectric sensing and demonstrate its capability to obtain scanning tunneling microscopy as well as high-resolution non-contact atomic force microscopy images on an atomically flat Au(111) surface. Equipped with a focused ion beam deposited tungsten tip, the active MEMS cantilever is able to obtain high contrast scanning tunneling and frequency shift images at the fundamental and a higher eigenmode of the cantilever. This is interesting for the application of multifrequency AFM operation modes that could enhance the capabilities of the bond imaging technique.
Keywords: Low temperature atomic force microscopy; Bond imaging; On-surface synthesis