Combined Antenna and Localized Plasmon Resonance in Raman Scattering from Random Arrays of Silver-Coated, Vertically Aligned Multiwalled Carbon Nanotubes
| Autor: | William I. Milne, Matthew Doherty, Steven E. J. Bell, Michael Boyle, J.A. Dueñas, Paul Dawson, Koon K. Teo, O. F. J. Martin, Andreas M. Kern, Aun Shih Teh |
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| Rok vydání: | 2011 |
| Předmět: |
Silver
Nanostructure Materials science Macromolecular Substances Surface Properties Molecular Conformation Bioengineering Nanotechnology Context (language use) Carbon nanotube law.invention symbols.namesake law Electric field Materials Testing General Materials Science Particle Size Surface plasmon resonance Plasmon Computer Science::Information Theory Nanotubes Carbon business.industry Mechanical Engineering Astrophysics::Instrumentation and Methods for Astrophysics Equipment Design General Chemistry Surface Plasmon Resonance Condensed Matter Physics Equipment Failure Analysis symbols Optoelectronics Antenna (radio) Crystallization business Raman scattering |
| Zdroj: | Nano Letters. 11:365-371 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl102838w |
| Popis: | The electric field enhancement associated with detailed structure within novel optical antenna nanostructures is modeled using the surface integral equation technique in the context of surface-enhanced Raman scattering (SERS). The antennae comprise random arrays of vertically aligned, multiwalled carbon nanotubes dressed with highly granular Ag. Different types of "hot-spot" underpinning the SERS are identified, but contrasting characteristics are revealed. Those at the outer edges of the Ag grains are antenna driven with field enhancement amplified in antenna antinodes while intergrain hotspots are largely independent of antenna activity. Hot-spots between the tops of antennae leaning towards each other also appear to benefit from antenna amplification. |
| Databáze: | OpenAIRE |
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