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Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
Published on: May 28, 2016
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Colloidal plasmonic nanostar antennas with wide range resonance tunability.
Ted V Tsoulos1, Supriya Atta2, Maureen J Lagos3
1Department of Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, USA. lfabris@soe.rutgers.edu.
Nanoscale
|October 5, 2019
Summary
Researchers developed a novel 6-spike gold nanostar, overcoming limitations of previous designs. This new plasmonic nanoparticle offers tunable resonances from 600-2000 nm for advanced applications.
Area of Science:
- Nanotechnology
- Materials Science
- Plasmonics
Background:
- Gold nanostars are key plasmonic nanoparticles due to strong field enhancement and tunable resonances.
- Limitations include complex morphology and poor monodispersity, hindering technological use.
Purpose of the Study:
- To address limitations of existing gold nanostars by designing and realizing a novel 6-spike nanostar.
- To create a 3D plasmonic nanoantenna with wide-range tunability and improved stability.
Main Methods:
- Computational study of a novel 6-spike nanostar morphology.
- Synthetic realization of the proposed nanostar design.
- Experimental characterization of plasmonic properties from single particles to ensembles.
Main Results:
- The 6-spike nanostar exhibits a unique plasmonic response, consistent from single particles to ensembles.
- Multiple, well-separated, narrow resonances were observed.
- The intense resonance extended farther in space than previously reported for similar nanostructures.
- Resonant modes were tunable across a broad range (600–2000 nm).
Conclusions:
- The novel 6-spike nanostar overcomes previous limitations, offering a robust platform for plasmonic applications.
- Its unique morphology-plasmonic correlation enables wide tunability, suitable for cutting-edge technologies.
- This design merges advantages of top-down and bottom-up fabrication methods.
