Visualization of Vibrational Modes in Real Space by Tip-Enhanced Non-Resonant Raman Spectroscopy
2016 (English)In: Angewandte Chemie International Edition, ISSN 1433-7851, E-ISSN 1521-3773, Vol. 55, no 3, 1041-1045 p.Article in journal (Refereed) PublishedText
We present a general theory to model the spatially resolved non-resonant Raman images of molecules. It is predicted that the vibrational motions of different Raman modes can be fully visualized in real space by tip-enhanced non-resonant Raman scattering. As an example, the non-resonant Raman images of water clusters were simulated by combining the new theory and first-principles calculations. Each individual normal mode gives rise its own distinct Raman image, which resembles the expected vibrational motions of the atoms very well. The characteristics of intermolecular vibrations in supermolecules could also be identified. The effects of the spatial distribution of the plasmon as well as nonlinear scattering processes were also addressed. Our study not only suggests a feasible approach to spatially visualize vibrational modes, but also provides new insights in the field of nonlinear plasmonic spectroscopy.
Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2016. Vol. 55, no 3, 1041-1045 p.
ab initio calculations, Raman spectroscopy, surface chemistry, vibrational spectroscopy, water adsorption
IdentifiersURN: urn:nbn:se:kth:diva-182852DOI: 10.1002/anie.201508218ISI: 000368070000034PubMedID: 26563759ScopusID: 2-s2.0-84954214752OAI: oai:DiVA.org:kth-182852DiVA: diva2:906569
QC 201602242016-02-242016-02-232016-02-24Bibliographically approved