title: Chiral meta-molecules consisting of gold nanoparticles and genetically engineered tobacco mosaic virus.
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.
authors.affiliation: Division of Protein Engineering, The Cancer Institute of the Japanese Foundation for Cancer Research, 3-8-31 Ariake, Koto, Tokyo 135-8550, Japan.
authors.forename: Mime
authors.initials: M
authors.lastname: Kobayashi
authors.forename: Satoshi
authors.initials: S
authors.lastname: Tomita
authors.forename: Kei
authors.initials: K
authors.lastname: Sawada
authors.forename: Kiyotaka
authors.initials: K
authors.lastname: Shiba
authors.forename: Hisao
authors.initials: H
authors.lastname: Yanagi
authors.forename: Ichiro
authors.initials: I
authors.lastname: Yamashita
authors.forename: Yukiharu
authors.initials: Y
authors.lastname: Uraoka
mesh_terms: D000042:Absorption; D002942:Circular Dichroism; D005818:Genetic Engineering; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D014027:Tobacco Mosaic Virus / Q000737:chemistry* / Q000235:genetics* / Q000648:ultrastructure
chemical_list: D012996:Solutions; D006046:Gold