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Plasmonic polymers unraveled through single particle spectroscopy
Liane S Slaughter1, Lin-Yung Wang, Britain A Willingham
1Department of Chemistry, Rice University, 6100 Main St., Houston, TX 77005, USA.
Nanoscale
|August 27, 2014
Summary
We studied plasmonic polymers, which are nanoparticle chains, to understand their optical properties. The superradiant plasmon mode
Area of Science:
- Nanotechnology
- Materials Science
- Plasmonics
Background:
- Plasmonic polymers are quasi one-dimensional nanoparticle assemblies.
- Their optical properties depend on coupled localized surface plasmons.
Purpose of the Study:
- To investigate how nanoparticle size, chain length, and disorder affect plasmonic polymer optical responses.
- To analyze the superradiant plasmon mode in detail.
Main Methods:
- Single particle extinction spectroscopy.
- Electron microscopy.
- Theoretical analysis.
Main Results:
- The superradiant mode redshifts with increasing chain length, reaching an infinite chain limit.
- The number of repeat units, not overall length, dictates the infinite chain limit energy.
- Nanoparticle size and number influence the superradiant mode's intensity and linewidth.
Conclusions:
- Findings offer guidelines for tuning the optical properties of plasmonic polymers.
- Engineering plasmonic polymers requires considering nanoparticle size, number, and arrangement.
