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)(3+)6 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-.