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The electrical conductivity of carbon nanotube buckypapers can be dramatically increased by incorporation of silver particles contained in a commercial silver paste.Two methods,co-dispersion during the production of buckypaper and surface coating on a preformed buckypaper,were used to prepare composite buckypapers.The two types of composite buckypapers exhibited very different electrical conductivity profiles.The composite buckypapers prepared by the surface coating method showed a distinct step transition in electrical conductivity at 3 vol%silver content,leading to a 15-fold improvement at 6%silver content.The composite buckypapers prepared by the co-dispersion method showed a gradual change in electrical conductivity with increasing silver particle content,resulting in a five-fold improvement at12%silver content.Surface and sectional morphologies of the two types of composite buckypapers were examined and related to their electrical conductivity profiles.
The electrical conductivity of carbon nanotube bucky papers can be dramatically increased by incorporation of silver particles contained in a commercial silver paste. Two methods, co-dispersion during the production of buckypaper and surface coating on a preformed buckypaper, were used to prepare composite buckypapers. Two types of composite bucky papers exhibited very different electrical conductivity profiles. The composite buckypapers prepared by the surface coating method showed a distinct step transition in electrical conductivity at 3 vol% silver content, leading to a 15-fold improvement at 6% silver content. composite buckypapers prepared by the co-dispersion method showed a gradual change in electrical conductivity with increasing silver particle content, resulting in a five-fold improvement at12% silver content. Surface and sectional morphologies of the two types of composite bucky papers were examined and related to their electrical conductivity profiles.