Self-assembly of cobalt nanoparticle rings.
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.
Tripp
Steven L
SL
Department of Chemistry, Purdue University, 1393 Brown Building, West Lafayette, Indiana 47907-1393, USA.
Pusztay
Stephen V
SV
Ribbe
Alexander E
AE
Wei
Alexander
A