En visioconférence
Guillaume Schull - Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS)
Abstract
The electric current traversing the junction of a scanning tunneling microscope (STM) may lead to a local emission of light that can be used to generate sub-molecularly resolved fluorescence maps of individual molecules. Combined with spectral selection and time-correlated measurements, this hyper-resolved fluorescence microscopy approach allowed us to scrutinize the vibronic structure of individual molecules [1] in a very similar way than in the recent TERS reports, without requiring an optical excitation. We used this approach to characterize the photonics properties of charged species [2] to track the motion of hydrogen atoms within free-based phthalocyanine molecules [3], and to address energy transfers between complex chromophore architectures [4]. Together with other recent reports [5,6], these results constitute an important step towards photonic measurements with atoms-scale resolution.
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