期刊
NANO LETTERS
卷 13, 期 7, 页码 3256-3261出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl4013776
关键词
Chiral nanostructures; circular dichroism; nanoparticle assembly; chirality; surface plasmon
类别
资金
- National Science Foundation [DMR-0954380]
- Air Force Office of Scientific Research [FA9550-11-1-0275]
- National Institutes of Health [GM085043]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-06CH11357]
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 dipoledipole 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.
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