Chiral meta-molecules consisting of gold nanoparticles and genetically engineered tobacco mosaic virus

Mime Kobayashi; Satoshi Tomita; Kei Sawada; Kiyotaka Shiba; Hisao Yanagi; Ichiro Yamashita; Yukiharu Uraoka

doi:10.1364/OE.20.024856

Chiral meta-molecules consisting of gold nanoparticles and genetically engineered tobacco mosaic virus

Mime Kobayashi, Satoshi Tomita, Kei Sawada, Kiyotaka Shiba, Hisao Yanagi, Ichiro Yamashita, Yukiharu Uraoka

Research output: Contribution to journal › Article

25 Citations (Scopus)

Abstract

We demonstrate a chiral meta-molecule in the ultraviolet (UV) and visible (VIS) regions using a complex of Au nanoparticles (NPs) and rod-shaped tobacco mosaic virus (TMV). Au NPs five nm in diameter are uniformly formed on peptide-modified TMV. The peptide-modified TMV with uniform-sized Au NPs has improved dispersion in solution. A negative circular dichroism (CD) peak is produced around 540 nm, at plasmonic resonance wavelength of Au NPs. Additionally, modification of a CD peak in the UV region is observed. Attaching NPs to a virus causes the enhancement and modification of CD peaks in both the UV and VIS regions. Our results open a new avenue for the preparation of three dimensional chiral metamaterials at optical frequencies.

Original language	English
Pages (from-to)	24856-24863
Number of pages	8
Journal	Optics Express
Volume	20
Issue number	22
DOIs	https://doi.org/10.1364/OE.20.024856
Publication status	Published - 2012 Oct 22
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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Kobayashi, M., Tomita, S., Sawada, K., Shiba, K., Yanagi, H., Yamashita, I., & Uraoka, Y. (2012). Chiral meta-molecules consisting of gold nanoparticles and genetically engineered tobacco mosaic virus. Optics Express, 20(22), 24856-24863. https://doi.org/10.1364/OE.20.024856

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AU - Sawada, Kei

AU - Shiba, Kiyotaka

AU - Yanagi, Hisao

AU - Yamashita, Ichiro

AU - Uraoka, Yukiharu

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