Charge Transfer at Hybrid Interfaces: Plasmonics of Aromatic Thiol-Capped Gold Nanoparticles - Archive ouverte HAL Access content directly
Journal Articles ACS Nano Year : 2015

Charge Transfer at Hybrid Interfaces: Plasmonics of Aromatic Thiol-Capped Gold Nanoparticles

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 sand 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.
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hal-01291241 , version 1 (21-03-2016)

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Claire Goldmann, Rémi Lazzari, Xavier Paquez, Cédric Boissière, François Ribot, et al.. Charge Transfer at Hybrid Interfaces: Plasmonics of Aromatic Thiol-Capped Gold Nanoparticles. ACS Nano, 2015, 9 (7), pp.7572-7582. ⟨10.1021/acsnano.5b02864⟩. ⟨hal-01291241⟩
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