SKM 2023 – scientific programme

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O: Fachverband Oberflächenphysik

O 54: Focus Session: Scanning Probe Microscopy with Quartz Sensors II

O 54.2: Talk

Wednesday, March 29, 2023, 15:30–15:45, CHE 89

Does surface adsorption change the reactivity of an organic molecule? — Jack Henry, Philip Blowey, and •Adam Sweetman — University of Leeds, United Kingdom

Adsorption onto metal surfaces is known to alter the electronic [1], and geometric [2] structure of small organic molecules. However, the change in reactivity of a single molecule induced by the presence of a surface is less well studied. We investigated the influence of molecule-substrate bonding on the interactions experienced by a scanning probe microscope (SPM) tip by studying C60 molecules adsorbed in different configurations [3-5] on the Cu(111) surface, using qPlus NC-AFM/STM at 5K. We compare the minima in collected force spectra to complementary ab initio (DFT) simulations, and discuss the substantial differences in our results compared to the existing literature [3]. 1. Repp, J., et al. (2005). Physical Review Letters, 94(2), 026803. 2. L. Gross, et al. Science 325, 1110 (2009). 3. Jonathan Brand et al. Nano Letters 2019 19 (11), 7845-7851 4. W. W. Pai, et al. Physical Review Letters 104, (2010). 5. L. Forcieri, et al. Physical Review B 104, (2021).