Cobalt superstructured

Superparamagnetic nanoparticles can form chains even at zero field as has been demonstrated by simulations and by experiment in a dispersion of iron nanoparticles at zero field. Ring formation happens by unpaired dipoles at the ends of chains and have also been observed with 27 nm cobalt particles. External magnetic fields can by applied in order to orient flexible chains in one direction enabling formation of superstructures. 

Platinates, bis(oxalato)-, 139 cadmium complexes superstructure, 142 cobalt complexes, 140 electrical conductivity, 14] superstructure, 141 thermopower, 141 divalent cation salts, 140 iron complexes structure, 142 lead complexes superstructure, 142 magnesium complexes, 140 electrical conduction, 142 structure, 142 thermopower, 142 modulated superstructure, 139 monovalent cation salts, 139 nickel complexes structure, 141 partially oxidized, 139 Platinates, tetracyano-, 136 anion-deficient salts, 136 electrical conduction, 138 optical properties, 138 cation-deficient salts, 138 oxidation states, 136 partially oxidized, 138 semiconductors, 134 Platinum colloidal... 

Another exciting example of the effect of particle shape on self-assembly is the formation of the cobalt nanorod superstructures, as observed by Chaudret et al. [52]. 

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