Journal
NATIONAL SCIENCE REVIEW
Volume 6, Issue 6, Pages 1169-1175Publisher
OXFORD UNIV PRESS
DOI: 10.1093/nsr/nwz180
Keywords
scanning Raman picoscopy; tip-enhanced Raman spectroscopy; structure determination; vibrational mode imaging; interference effect
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Funding
- National Key RAMP
- D Program of China [2016YFA0200600, 2017YFA0303500]
- National Natural Science Foundation of China
- Chinese Academy of Sciences
- Anhui Initiative in Quantum Information Technologies
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The strong spatial confinement of a nano cavity plasmonic field has made it possible to visualize the inner structure of a single molecule and even to distinguish its vibrational modes in real space. With such ever-improved spatial resolution, it is anticipated that full vibrational imaging of a molecule could be achieved to reveal molecular structural details. Here we demonstrate full Raman images of individual vibrational modes at the angstrom level for a single Mg-porphine molecule, revealing distinct characteristics of each vibrational mode in real space. Furthermore, by exploiting the underlying interference effect and Raman fingerprint database, we propose a new methodology for structural determination, which we have called 'scanning Raman picoscopy', to show how such ultrahigh-resolution spectromicroscopic vibrational images can be used to visually assemble the chemical structure of a single molecule through a simple Lego-like building process.
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