title: Organo-soluble chiral thiol-monolayer-protected gold nanorods.
abstract: Here, we report the synthesis and characterization of organo-soluble chiral thiol-monolayer-protected gold nanorods. The resulting gold nanorods respectively covered with two opposite enantiomers via the strong covalent Au-S linkage were found to not only be stable in both organic media and solid state, but also show optical activity. Their circular dichroism (CD) spectra exhibited a mirror image relationship, indicating that enantiomeric thiol surfactant on gold surface can produce the corresponding enantiomeric gold nanorods. The densely packed azobenzene thiol monolayer on gold surface exhibited a photoresponsive behavior upon irradiation with 254 nm light instead of 365 nm light, which was found to have an effect on plasmonic absorption of gold nanorods.
authors.affiliation: Liquid Crystal Institute, Kent State University, Kent, Ohio 44242, United States.
authors.forename: Yannian
authors.initials: Y
authors.lastname: Li
authors.forename: Dingshan
authors.initials: D
authors.lastname: Yu
authors.forename: Liming
authors.initials: L
authors.lastname: Dai
authors.forename: Augustine
authors.initials: A
authors.lastname: Urbas
authors.forename: Quan
authors.initials: Q
authors.lastname: Li
mesh_terms: D006046:Gold / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D055620:Optical Phenomena; D012995:Solubility; D013057:Spectrum Analysis; D013237:Stereoisomerism; D013438:Sulfhydryl Compounds / Q000737:chemistry*
chemical_list: D013438:Sulfhydryl Compounds; D006046:Gold