Presentation Information
[2F04]Atomic-scale study of thiol-terminated molecules anchored to single S vacancies in MoS2/Au(111)
*Rika Simon1,2, Dmitrii Maksimov3, Christian Lotze1, Paul Wiechers1, Juan Pablo Guerrero Felipe1, Björn Kobin4, Jutta Schwarz4, Stefan Hecht4,5, Katharina J. Franke1, Mariana Rossi3 (1. Freie Universität Berlin, Germany, 2. IMRAM, Tohoku University, 3. Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany, 4. Humboldt-Universität zu Berlin, Germany, 5. Center for Science of Materials, Berlin, Germany)
Sulphur vacancies in MoS2 on Au(111) have been shown to be negatively charged as reflected by a Kondo resonance. Here, we use scanning tunneling microscopy (STM) to utilise these vacancies as anchoring sites for thiol-based molecules (CF3-3P-SH). The anchoring process leads to two distinct reaction products, one of which shows a Kondo resonance. Based on comparisons with density-functional theory (DFT) calculations we conclude that both anchored molecules are charge neutral. We propose that one is an anchored intact CF3-3P-SH molecule while the other is the result of dehydrogenation to CF3-3P-S with subsequent anchoring.