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Charge Transfer at Hybrid Interfaces: Plasmonics of Aromatic Thiol-Capped Gold Nanoparticles.
- Source :
-
ACS nano [ACS Nano] 2015 Jul 28; Vol. 9 (7), pp. 7572-82. Date of Electronic Publication: 2015 Jul 20. - Publication Year :
- 2015
-
Abstract
- Although gold nanoparticles stabilized by organic thiols are the building blocks in a wide range of applications, the role of the ligands on the plasmon resonance of the metal core has been mostly ignored until now. Herein, a methodology based on the combination of spectroscopic ellipsometry and UV-vis spectroscopy is applied to extract dielectric functions of the different components. It is shown that aromatic thiols allow a significant charge transfer at the hybrid interface with the s and d bands of the gold core that yields "giant" red shifts of the plasmon band, up to 40 nm for spherical particles in the size range of 3-5 nm. These results suggest that hybrid nanoplasmonic devices may be designed through the suitable choice of metal core and organic components for optimized charge exchange.
Details
- Language :
- English
- ISSN :
- 1936-086X
- Volume :
- 9
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- ACS nano
- Publication Type :
- Academic Journal
- Accession number :
- 26161962
- Full Text :
- https://doi.org/10.1021/acsnano.5b02864