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ROOM TEMPERATURE BULK SYNTHESIS OF SILVER NANOCABLES WRAPPED WITH POLYPYRROLE
Citation:
NADAGOUDA, M. N. AND R. S. VARMA. ROOM TEMPERATURE BULK SYNTHESIS OF SILVER NANOCABLES WRAPPED WITH POLYPYRROLE. Kaplin, Russell, et al (ed.), Macromolecular Rapid Communications. Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, Germany, 28(21):2106-2111, (2007).
Impact/Purpose:
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Description:
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 of an aqueous solution with AgNO3 as an oxidizing agent. The four probe conductivity results of the as synthesized silver nanocables of polypyrrole films were found to be 3, 5, 5 and 9 S/cm for 1:2, 1:1, 1:0.5 and 1:0.1 silver to pyrrole ratio, respectively. This approach can be extended to other monomers like aniline and N-methylaniline (NMA) to prepare different morphologies of silver nanostructures. Aniline monomer polymerization occurred at room temperature with a coating of silver mirror on the side walls of the glass vial, as in the case of tollen’s process of making silver mirrors. We extended the silver mirror coating strategy on polyethyleneterephthalate (PET) surface and measured the resistivity of polyaniline coated Ag nanocomposites and found them to be semiconducting.
