Related Experiment Video
Updated: Jul 4, 2026
09:12
Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
Published on: May 28, 2016
Reconfigurable core-satellite nanoassemblies as molecularly-driven plasmonic switches
David S Sebba1, Jack J Mock, David R Smith
1Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA.
Nano Letters
|June 11, 2008
Summary
Researchers controlled plasmon coupling in gold nanoparticle assemblies using DNA nanostructures. Reconfiguring DNA changed particle spacing, altering light interactions and validating structural models.
Area of Science:
- Nanotechnology
- Plasmonics
- Biophysics
Background:
- Plasmon coupling in nanoparticle assemblies is crucial for optical properties.
- DNA nanostructures offer precise control over nanoparticle arrangement.
- Understanding molecular-level control is key for advanced optical materials.
Purpose of the Study:
- To investigate molecular control of plasmon coupling in core-satellite gold nanoparticle assemblies.
- To correlate DNA nanostructure reconfiguration with changes in plasmon resonance.
- To validate structural models linking DNA dynamics to optical properties.
Main Methods:
- Fabrication of sub-100 nm gold core-satellite nanoparticle assemblies using DNA nanostructures.
- Reconfiguration of DNA nanostructures between compact and extended states.
- Scattering spectroscopy to measure plasmon resonance shifts.
- Comparison of experimental data with simulations based on TEM imaging and structural models.
Main Results:
- DNA nanostructure reconfiguration blue-shifted the plasmon resonance, indicating reduced interparticle coupling.
- The observed spectral shift correlated with increased core-satellite tether length.
- Structural models accurately predicted spectral changes based on particle size and tether length.
Conclusions:
- DNA nanostructures provide effective molecular control over plasmon coupling in nanoparticle assemblies.
- The study validates the use of structural modeling to understand plasmon modulation by DNA reconfiguration.
- This work advances the design of tunable optical nanomaterials.
