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

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...

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Published inOptics express Vol. 20; no. 22; pp. 24856 - 24863
Main Authors Kobayashi, Mime, Tomita, Satoshi, Sawada, Kei, Shiba, Kiyotaka, Yanagi, Hisao, Yamashita, Ichiro, Uraoka, Yukiharu
Format Journal Article
LanguageEnglish
Published United States 22.10.2012
Subjects
Absorption
Circular Dichroism
Genetic Engineering
Gold - chemistry
Metal Nanoparticles - chemistry
Metal Nanoparticles - ultrastructure
Solutions
Spectrophotometry, Ultraviolet
Tobacco Mosaic Virus - chemistry
Tobacco Mosaic Virus - genetics
Tobacco Mosaic Virus - ultrastructure
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Summary: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.
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ISSN:1094-4087
1094-4087
DOI:10.1364/oe.20.024856