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- W2061492557 abstract "The growth of shaped carbon nanomaterials from a range of substituted alkynes over a NiO catalyst was investigated. It was found that the structure of the substituted alkyne affected both catalyst morphology and carbon fiber growth. For linear alkynes (1-pentyne to 1-octyne) the fiber morphology and yield varied with the type of alkyne used. It was also found that hetero-atoms (Cl, Br, OH and NH2) greatly impacted carbon fiber growth and structure. An analysis of the catalyst particles associated with the carbon fibers grown from various alkynes showed that different alkynes gave differently shaped Ni catalyst particles. It was found that pre-treatment of the catalyst with an alkyne such as trimethylsilyl acetylene or ethynyl aniline (that did not give fiber growth), followed by treatment with acetylene initiated fiber growth morphologies (Y-junction, helical or straight fibers) different from that observed after direct treatment with acetylene. Further, sequential fiber growth from two alkynes that were both capable of producing fibers (e.g. methyl prop-2-ynoate followed by prop-2-yn-1-amine) resulted in ‘co-block’ fiber growth. These results highlight the dynamic relationships that exists between carbon source, catalyst morphology and carbon nanomaterial growth." @default.
- W2061492557 created "2016-06-24" @default.
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- W2061492557 date "2012-03-01" @default.
- W2061492557 modified "2023-09-23" @default.
- W2061492557 title "The effect of substituted alkynes on nickel catalyst morphology and carbon fiber growth" @default.
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- W2061492557 doi "https://doi.org/10.1016/j.carbon.2011.10.020" @default.
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