منابع مشابه
Improved graphitization and electrical conductivity of suspended carbon nanofibers derived from carbon nanotube/polyacrylonitrile composites by directed electrospinning
Single suspended carbon nanofibers on carbon micro-structures were fabricated by directed electrospinning and subsequent pyrolysis at 900 C of carbon nanotube/polyacrylonitrile (CNT/PAN) composite material. The electrical conductivity of the nanofibers was measured at different weight fractions of CNTs. It was found that the conductivity increased almost two orders of magnitude upon adding 0.5 ...
متن کاملCarbon nanotubes and other graphitic structures as contaminants on evaporated carbon films
High-resolution electron microscopy (HREM) has been widely used in studies of fullerene-related carbons, and in particular has been applied extensively to the study of carbon nanotubes (Iijima, 1991; Ebbesen & Ajayan, 1992) and carbon nanoparticles (Harris et al., 1993; Saito et al., 1993). The purpose of this Note is to draw the attention of workers in this field to the fact that carbon nanotu...
متن کاملNanoscale zirconia as a nonmetallic catalyst for graphitization of carbon and growth of single- and multiwall carbon nanotubes.
We report that nanoparticulate zirconia (ZrO(2)) catalyzes both growth of single-wall and multiwall carbon nanotubes (CNTs) by thermal chemical vapor deposition (CVD) and graphitization of solid amorphous carbon. We observe that silica-, silicon nitride-, and alumina-supported zirconia on silicon nucleates single- and multiwall carbon nanotubes upon exposure to hydrocarbons at moderate temperat...
متن کاملEffect of Graphitization on Solid State Bonding of Carbon to Nickel*
Five carbons with different graphitization degrees, which were heat-treated at temperatures of 1273 to 3273K, were prepared. These carbons were bonded to nickel in a vacuum, using an RF-induction furnace, with joining temperatures of 1073 to 1273K. On the basis of the results of these experiments, the effects of the graphitization degree on the solid-state bonding of carbon to nickel were exami...
متن کاملEffect of graphitization on the wettability and electrical conductivity of CVD-carbon nanotubes and films.
The use of carbon nanomaterials in various applications requires precise control of their surface and bulk properties. In this paper, we present a strategy for modifying the surface chemistry, wettability, and electrical conductivity of carbon tubes and films through annealing in a vacuum. Experiments were conducted with 60-300 nm nanotubes (nanopipes), produced by noncatalytic chemical vapor d...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1961
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.64.12_2083