Journal
NANO LETTERS
Volume 15, Issue 12, Pages 7982-7986Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b03093
Keywords
Atomic-scale surface defects; surface enhanced Raman scattering; localized surface plasmon resonance; metal molecule interactions
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Funding
- Japan Society for the Promotion of Science (JSPS) [24681018]
- World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics
- Program for Development of Environmental Technology using Nanotechnology of the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan
- Grants-in-Aid for Scientific Research [24681018, 15K05372] Funding Source: KAKEN
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Molecule substrate interactions are sensitively affected by atomic-scale surface structures. Unique activity in heterogeneous catalysts or electrocatalysts is often related with local surface sites with specific structures. We demonstrate that adsorption geometry of a model molecule with an isocyanide anchor is drastically varied among one-fold atop, two-fold bridge, and three-fold hollow configurations with increasing the size of atomic-scale local surface sites of Pd islands on an Au(111) model surface. The vibrational spectroscopic observation of such local information is realized by site-selective and self-assembled formation of hotspots, where Raman scattering intensity is significantly enhanced via excitation of localized surface plasmons.
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