title: Nanorings from the self-assembly of amphiphilic molecular dumbbells.
abstract: We have prepared amphiphilic dumbbell molecules consisting of hydrophobic alkyl chains and hydrophilic oligoether dendrons at each end of the rod segment. The molecular dumbbells, in aqueous solution, self-assemble into toroids as an intermediate nanostructure between spherical and long cylindrical micelles. The formation of toroidal structure is likely to originate from side by side connections of discrete bundles through the combination of strong hydrophobic interactions and anisotropic aggregation of rod segments.
authors.affiliation: Center for Supramolecular Nano-Assembly and Department of Chemistry, Yonsei University, Seoul 120-749, Korea.
authors.forename: Jung-Keun
authors.initials: JK
authors.lastname: Kim
authors.forename: Eunji
authors.initials: E
authors.lastname: Lee
authors.forename: Zhegang
authors.initials: Z
authors.lastname: Huang
authors.forename: Myongsoo
authors.initials: M
authors.lastname: Lee