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20 August 2020 Tip-enhanced Raman spectroscopy: electron density shift at the metal-molecule interface induced by a static electric field
Alfred J. Meixner, Otto Hauler, Dai Zhang, Kai Braun
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Proceedings Volume 11468, Enhanced Spectroscopies and Nanoimaging 2020; 114680N (2020) https://doi.org/10.1117/12.2570738
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
In SERS and TERS charge transfer can lead to the chemical signal enhancement. STM assisted TERS allows for applying DC electric fields between tip and sample comparably high to the fields experienced by molecules in regular devices. The influence of DC electric fields on tip enhanced Raman spectra has been reported by various authors who discussed different aspects such as reorientation of molecules, intensity changes and energy level shifts. Here we report on our progress towards a better understanding of a scanning DC electric field on tip enhanced Raman spectra of small molecules directly bound to the metallic substrate.
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Alfred J. Meixner, Otto Hauler, Dai Zhang, and Kai Braun "Tip-enhanced Raman spectroscopy: electron density shift at the metal-molecule interface induced by a static electric field", Proc. SPIE 11468, Enhanced Spectroscopies and Nanoimaging 2020, 114680N (20 August 2020); https://doi.org/10.1117/12.2570738
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KEYWORDS
Molecules
Interfaces
Molecular electronics
Chemical species
Metals
Raman spectroscopy
Electronic components
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