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Tailorable plasmonic circular dichroism properties of helical nanoparticle superstructures.
- Source :
-
Nano letters [Nano Lett] 2013 Jul 10; Vol. 13 (7), pp. 3256-61. Date of Electronic Publication: 2013 Jun 24. - Publication Year :
- 2013
-
Abstract
- We utilize a peptide-based methodology to prepare a diverse collection of double-helical gold nanoparticle superstructures having controllable handedness and structural metrics. These materials exhibit well-defined circular dichroism signatures at visible wavelengths owing to the collective dipole-dipole interactions between the nanoparticles. We couple theory and experiment to show how tuning the metrics and structure of the helices results in predictable and tailorable chirooptical properties. Finally, we experimentally and theoretically demonstrate that the intensity, position, and nature of the chirooptical activity can be carefully adjusted via silver overgrowth. These studies illustrate the utility of peptide-based nanoparticle assembly platforms for designing and preparing complex plasmonic materials with tailorable optical properties.
Details
- Language :
- English
- ISSN :
- 1530-6992
- Volume :
- 13
- Issue :
- 7
- Database :
- MEDLINE
- Journal :
- Nano letters
- Publication Type :
- Academic Journal
- Accession number :
- 23777529
- Full Text :
- https://doi.org/10.1021/nl4013776