Multimodal plasmonics in fused colloidal networks.
| Autor: | Teulle A; CEMES CNRS UPR 8011, 29 rue J. Marvig, 31055 Toulouse Cedex 4, France., Bosman M; Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, 117602 Singapore, Singapore., Girard C; CEMES CNRS UPR 8011, 29 rue J. Marvig, 31055 Toulouse Cedex 4, France., Gurunatha KL; CEMES CNRS UPR 8011, 29 rue J. Marvig, 31055 Toulouse Cedex 4, France., Li M; Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, UK., Mann S; Centre for Organized Matter Chemistry, School of Chemistry, University of Bristol, Cantocks Close, Bristol BS8 1TS, UK., Dujardin E; CEMES CNRS UPR 8011, 29 rue J. Marvig, 31055 Toulouse Cedex 4, France. |
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| Jazyk: | angličtina |
| Zdroj: | Nature materials [Nat Mater] 2015 Jan; Vol. 14 (1), pp. 87-94. Date of Electronic Publication: 2014 Oct 26. |
| DOI: | 10.1038/nmat4114 |
| Abstrakt: | Harnessing the optical properties of noble metals down to the nanometre scale is a key step towards fast and low-dissipative information processing. At the 10-nm length scale, metal crystallinity and patterning as well as probing of surface plasmon properties must be controlled with a challenging high level of precision. Here, we demonstrate that ultimate lateral confinement and delocalization of surface plasmon modes are simultaneously achieved in extended self-assembled networks comprising linear chains of partially fused gold nanoparticles. The spectral and spatial distributions of the surface plasmon modes associated with the colloidal superstructures are evidenced by performing monochromated electron energy-loss spectroscopy with a nanometre-sized electron probe. We prepare the metallic bead strings by electron-beam-induced interparticle fusion of nanoparticle networks. The fused superstructures retain the native morphology and crystallinity but develop very low-energy surface plasmon modes that are capable of supporting long-range and spectrally tunable propagation in nanoscale waveguides. |
| Databáze: | MEDLINE |
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