Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 117, Issue 33, Pages 17196-17204Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp405769e
Keywords
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Funding
- MIUR of Italy
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali (INSTM)
- CNR of Rome (Italy)
- INFM DEMOCRITOS National Simulation Center, Trieste, Italy
- Zernike Institute for Advanced Materials
- HPC Europa2 programme [228398]
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The surface plasmon resonance has been theoretically investigated in gold nanowires by means of time-dependent density functional theory. Linear chains of Au atoms and nanowires with the structure of the fcc bulk gold grown along the < 110 > and < 111 > directions have been considered. The effects of changing the length and the section on the plasmon have been studied. Strong photoabsorption is found when the length is above 2 nm: in that case the absorption profile is characterized by a sharp peak, and its analysis reveals that many configurations contribute to the transition, confirming its collective nature as an s <- s intraband transition. As expected, the effect of increasing the length is reflected in a red shift of the plasmon.
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