Imaging Plasmon Hybridization in Metal Nanoparticle Aggregates with Electron Energy-Loss Spectroscopy
| Autor: | Nicholas P. Montoni, Guoliang Li, Charles Cherqui, Steven C. Quillin, David J. Masiello, Jon P. Camden |
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| Rok vydání: | 2016 |
| Předmět: |
Plasmonic nanoparticles
Materials science Electron energy loss spectroscopy Surface plasmon Physics::Optics Nanoparticle Nanotechnology Context (language use) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Physics::Atomic and Molecular Clusters Condensed Matter::Strongly Correlated Electrons Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Plasmon Localized surface plasmon |
| Zdroj: | The Journal of Physical Chemistry C. 120:20852-20859 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b02170 |
| Popis: | Electron energy-loss spectroscopy (EELS) provides detailed nanoscopic spatial and spectral information on plasmonic nanoparticles that cannot be discerned with far-field optical techniques. Here we demonstrate that EELS is capable of mapping the relative phases of individual localized surface plasmons that are hybridized within nanoparticle assemblies. Within the context of an effective plasmon oscillator model, we demonstrate the relationship between the self-induced back-force on the electron due to the plasmon and the EEL probability and use this to present a rubric for determining the relative phases of hybridized localized surface plasmons in EELS. Comparison between the analytical oscillator model, experiment, and numerical electrodynamics simulation is made across a variety of nanoparticle monomer, dimer, and trimer systems. |
| Databáze: | OpenAIRE |
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