Vapor growth of carbon micro-coils by the Ni catalyzed pyrolysis of acetylene using rotating substrate

Carbon micro-coils were obtained by the Ni-catalyzed pyrolysis of acetylene at 770 degrees C using a rotating substrate. The effects of the rotating s peed on the coil yield, morphology and chirality of the grown carbon coils were examined. The coil yield decreased by 35-50% due to the substrate rota tion of 180 rpm and irregular carbon coils were obtained, while regular coi ls were obtained without rotation. The carbon coils with a selective chiral ity could not be obtained. (C) 2000 Elsevier Science B.V. All rights reserv ed.