Regensburg 2019 – wissenschaftliches Programm

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

O: Fachverband Oberflächenphysik

O 83: Organic Molecules on Inorganic Substrates VI: Chirality, Charge Transfer, Self-Assembly

O 83.9: Vortrag

Donnerstag, 4. April 2019, 17:15–17:30, H9

Complex Probe Particle Model Simulations Supporting nc-AFM Experiments — •Ondrej Krejci¹, Fabian Schulz^1,2, Juha Ritala¹, Ari P. Seitsonen³, Peter Liljeroth¹, Shigeki Kawai⁴, Remy Pawlak⁵, Feng Xu⁶, Lifen Peng⁶, Akihiro Orita⁶, Ernst Meyer⁵, Tomihiko Nishiuchi⁷, Keisuke Sahara⁷, Takuya Kodama⁷, Takashi Kubo⁷, and Adam S. Foster^1,8,9 — ¹Aalto Uni., Espoo, Fin. — ²IBM Zurich, Swi. — ³Ecole Normale Superieure, Paris, Fra. — ⁴NIMS, Tsukuba, Jap. — ⁵Uni. of Basel, Swi. — ⁶Okayama Uni. of Science, Okayama, Ja. — ⁷Osaka Uni., Toyonaka, Jap. — ⁸Kanazawa Uni., Kanazawa, Jap. — ⁹Johannes Gutenberg Uni., Mainz, Ger.

I will present simulations of systems studied experimentally with a CO-tip AFM/STM and development of the probe particle AFM model. [1,2] The presentation will also contain description of the experiments and DFT calculations of the systems: The first is hBN/Ir(111). Unexpected contrast was observed in CO-tip AFM images. Complex electrostatics of the tip [3] helped us to understand the origin of the contrast. [4] The other systems are non-planar molecules adsorbed on Cu(111) and Au(111). More realistic description of the CO tip, [5] were found to be important for better agreement between simulations and experiments on these molecules. [6]

[1] Hapala et al. PRB 90, 085421, 2014. [2] Hapala et al. PRL 113, 226101, 2014. [3] Ellner et al. Nano Lett. 16, 1974, 2016. [4] Schulz et al. ACS Nano 12, 5274, 2018. [5] Di Giovannantonio et al. JACS 140, 3532, 2018. [6] Kawai et al. ACS Nano 12, 8791, 2018.