화학공학소재연구정보센터
Macromolecular Rapid Communications, Vol.28, No.21, 2106-2111, 2007
Room temperature bulk synthesis of silver nanocables wrapped with polypyrrole
Wet chemical synthesis of silver cables wrapped with polypyrrole is reported in aqueous media without use of any surfactant/capping agent and/or template. The method employs direct polymerization of pyrrole in an aqueous solution with AgNO3 as an oxidizing agent. The four probe conductivity results for the as-synthesized silver nanocables of polypyrrole films were found to be 3, 5, 5, and 9 S cm(-1) for a 1: 2, 1: 1, 1: 0.5, and 1: 0.1 silver-to-pyrrole ratio, respectively. This approach can be extended to other monomers such as aniline and N-methylaniline (NMA) to prepare different morphologies of silver nanostructures. Aniline monomer polymerization occurred at room temperature to produce a coating of a silver mirror on the side walls of the glass vial, as in the case of Tollen's process of making silver mirrors. The silver mirror coating strategy was extended to a poly(ethylene terephthalate) (PET) surface and the resistivity of the polyaniline-coated Ag nanocomposites were measured and found to be semiconducting. {graphics}