SurfaceScience21 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 99: Gerhard Ertl Young Investigator Award: Finalists session

O 99.3: Vortrag

Donnerstag, 4. März 2021, 14:30–15:00, R1

Manipulating charge states of individual molecules on insulators — •Shadi Fatayer, Florian Albrecht, Nikolaj Moll, and Leo Gross — IBM Research - Zurich

The physicochemical properties of molecules adsorbed on surfaces are charge-state dependent. Insulating films serve as an ideal platform to study the physics and chemistry of charged molecules, because these films avoid charge leakage. However, investigating individual charged molecules on insulators is experimentally challenging. The atomic force microscope (AFM), operable on insulating substrates and capable of single-electron sensitivity and atomic resolution, is suitable to be used with insulators. Here, I will present how different aspects of charged molecules can be accessed with the AFM: (i) How using the AFM as a single-electron current meter allows for tunneling spectroscopy to be performed on insulators and electron-transfer properties probed, (ii) how molecules in excited states can be prepared, (iii) how reversible chemical reactions can be performed via charging molecules and (iv) the insights gained via resolving the atomic structure of individual molecules in different charge states.