... doi:10.1186/1556-276X-6-431 Cite this article as: Zhang et al.: A Facile Synthesis of Polypyrrole/ Carbon Nanotube Composites with Ultrathin, Uniform and ThicknessTunable Polypyrrole Shells Nanoscale Research Letters ... Endo M, Kim YA, Ezaka M, Osada K, Yanagisawa T, Hayashi T, Terrones M, Dresselhaus MS: Selective and efficient impregnation of metal nanoparticles on cup-stacked-type carbon nanofibers Nano Lett ... http://www.nanoscalereslett.com/content/6/1/431 be smooth and uniform, and no agglomerations or irregular nanoparticles of polymer are found The various ratio of ethanol and acid solution as the reaction...