title: Metallic conductivity transition of carbon nanotube yarns coated with silver particles.
abstract: Dry spun carbon nanotube yarns made from vertically aligned multiwalled carbon nanotube forests possess high mechanical strength and behave like semiconductors with electrical conductivity of the order of 4 × 10(4) S m(-1). Coating a submicron-thick film of silver particle-filled polymer on the surface increased the electrical conductivity of the carbon nanotube yarn by 60-fold without significantly sacrificing its mechanical strength. The transitional characteristics of the silver-coated carbon nanotube yarn were investigated by varying the take-up ratio of the silver coating. A step change in conductivity was observed when the silver content in the coated yarn was between 7 and 10 wt% as a result of the formation of connected silver particle networks on the carbon nanotube yarn surface.
authors: Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-Central University for Nationalities, Wuhan, 430074, People's Republic of China. CSIRO Materials Science and Engineering, PO Box 21, Belmont, VIC 3216, Australia.
authors: Daohong
authors: D
authors: Zhang
authors: Yunhe
authors: Y
authors: Zhang
authors: Menghe
authors: M
authors: Miao