title: Self-assembly of cobalt nanoparticle rings.
abstract: Weakly ferromagnetic cobalt nanoparticles can assemble spontaneously into nanosized "bracelets" when dispersed in organic solvents containing resorcinarenes as surfactants. Bracelet self-assembly occurs in solution and is directed by magnetic dipolar interactions, whereas nanoparticle rings with larger diameters are produced by evaporation-driven flow on wetted surfaces.
authors.affiliation: Department of Chemistry, Purdue University, 1393 Brown Building, West Lafayette, Indiana 47907-1393, USA.
authors.forename: Steven L
authors.initials: SL
authors.lastname: Tripp
authors.forename: Stephen V
authors.initials: SV
authors.lastname: Pusztay
authors.forename: Alexander E
authors.initials: AE
authors.lastname: Ribbe
authors.forename: Alexander
authors.initials: A
authors.lastname: Wei