Controlled synthesis of nanorods/nanorings of a novel Co-Cu complex in microemulsion at room temperature

Novel Co-Cu complex nanorods with diameters of 100-200 nm and nanorings with a ring-diameter of 80 nm were synthesized via a microemulsion method at room temperature. Using this method, the addition of Co(NH3)63+ to aqueous solutions of Cu(II) in excessive carbonate promotes the assembly of a new highly charged carbonato-copper(II) anion, [Cu4(OH)(CO3)8]9-.