Plasmon spectroscopy and imaging of individual gold nanodecahedra
| Autor: | Viktor Myroshnychenko, Mathieu Kociak, Nicolas Geuquet, Luc Henrard, Jessica Rodríguez-Fernández, Kevin F. MacDonald, Isabel Pastoriza-Santos, Jaysen Nelayah, Luis M. Liz-Marzán, F. Javier García de Abajo, Nikolay I. Zheludev, Giorgio Adamo |
|---|---|
| Přispěvatelé: | European Commission, Ministerio de Ciencia e Innovación (España) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Cathodoluminescence spectral imaging Nanophotonics Physics::Optics Bioengineering Cathodoluminescence 02 engineering and technology 010402 general chemistry 01 natural sciences Molecular physics Optics Physics::Atomic and Molecular Clusters General Materials Science Spectroscopy Localized plasmons Plasmon Electron energy-loss spectroscopy business.industry Mechanical Engineering Electron energy loss spectroscopy Surface plasmon General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Surface plasmon polariton 0104 chemical sciences Boundary-element method Dark-field microscopy and spectroscopy 0210 nano-technology business Localized surface plasmon Gold nanodecahedra |
| Zdroj: | Myroshnychenko, V, García De Abajo, F J, Nelayah, J, Kociak, M, Adamo, G, MacDonald, K F, Zheludev, N I, Geuquet, N, Henrard, L, Rodríguez-Fernández, J, Pastoriza-Santos, I & Liz-Marzán, L M 2012, ' Plasmon spectroscopy and imaging of individual gold nanodecahedra : A combined optical microscopy, cathodoluminescence, and electron energy-loss spectroscopy study ', Nano Letters, vol. 12, no. 8, pp. 4172-4180 . https://doi.org/10.1021/nl301742h Nano Letters Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1530-6984 |
| Popis: | 9 pags, 6 figs Imaging localized plasmon modes in noble-metal nanoparticles is of fundamental importance for applications such as ultrasensitive molecular detection. Here, we demonstrate the combined use of optical dark-field microscopy (DFM), cathodoluminescence (CL), and electron energy-loss spectroscopy (EELS) to study localized surface plasmons on individual gold nanodecahedra. By exciting surface plasmons with either external light or an electron beam, we experimentally resolve a prominent dipole-active plasmon band in the far-field radiation acquired via DFM and CL, whereas EELS reveals an additional plasmon mode associated with a weak dipole moment. We present measured spectra and intensity maps of plasmon modes in individual nanodecahedra in excellent agreement with boundary-element method simulations, including the effect of the substrate. A simple tight-binding model is formulated to successfully explain the rich plasmon structure in these particles encompasing bright and dark modes, which we predict to be fully observable in less lossy silver decahedra. Our work provides useful insight into the complex nature of plasmon resonances in nanoparticles with pentagonal symmetry. © 2012 American Chemical Society. We acknowledge support from the European Union (NMP4-2006-016881-SPANS, NMP4-SL-2008-213669-ENSEMBLE, FP7-ICT-2009-4-248909-LIMA, and FP7-ICT-2009-4-248855-N4E), the Spanish MICINN (MAT2010-14885, MAT2010-15374, and Consolider NanoLight.es), and Ibercivis. V.M. acknowledges the Spanish CSIC - JAE grant. G.A. and N.I.Z. acknowledge support of the EPSRC and the Royal Society (London). L.M.L.-M. acknowledges funding from the ERC (Advanced Grant PLASMAQUO, 267867). |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|