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Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
Correlating nanorod structure with experimentally measured and theoretically predicted surface plasmon resonance
Abrin L Schmucker1, Nadine Harris, Matthew J Banholzer
1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA.
ACS Nano
|August 27, 2010
Summary
Researchers synthesized gold nanorods and developed a predictive equation for their surface plasmon resonance. This equation accurately forecasts longitudinal dipole resonance wavelengths for gold nanorods, aiding in nanomaterial design.
Area of Science:
- Nanotechnology
- Materials Science
- Physical Chemistry
Background:
- Gold nanorods exhibit unique optical properties due to surface plasmon resonance.
- Controlling nanorod dimensions is crucial for tuning these optical properties.
Purpose of the Study:
- To synthesize gold nanorods with controlled dimensions using anodic aluminum oxide templates.
- To experimentally and theoretically investigate the surface plasmon resonances of these nanorods.
- To derive a predictive model for the longitudinal dipole resonance wavelength.
Main Methods:
- Electrochemical synthesis of gold nanorods.
- Extinction spectroscopy to measure optical properties.
- Discrete dipole approximation for theoretical calculations.
- Analysis of factors influencing plasmon width.
Main Results:
- Homogeneous gold nanorod suspensions with varying diameters and lengths were synthesized.
- Experimental extinction spectra showed good agreement with theoretical calculations.
- A predictive equation for longitudinal dipole resonance wavelength was derived, accurate within 25 nm.
- Plasmon width analysis revealed a decrease with increasing length for long rods.
Conclusions:
- The derived equation provides a reliable method for predicting gold nanorod plasmon resonance.
- Understanding the relationship between dimensions and plasmon resonance is key for nanomaterial applications.
- The study contributes to the precise design of gold nanorods for optical applications.
