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Synthesis of carbon nanotubes with totally hollow channels and/or with totally copper filled nanowires

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Abstract

Carbon nanotubes (CNTs) with totally hollow channels and/or totally filled copper nanowires have been fabricated by methane decomposition using copper microgrid as a catalyst at 1173 K. The formation mechanism of CNTs with totally hollow channels is carbon precipitation at carbon-metal interface via the preferable surface diffusion mode of carbon. The selectivity of these CNTs can be improved by increasing the purity of copper catalysts and adding hydrogen in the feed gas. To form long and continuous copper nanowires up to 8–10 μm the filling of copper in the CNT channel requires the liquid or quasi-liquid state capillary adsorption of nanosized copper at 1173 K under the thermal driving force. The filling volume ratio of copper to total nano-channel of the CNTs is firstly increased to about 50%. The copper inside the CNTs is of single crystalline form and face centered cubic (fcc) structure. The method is useful for further controlled synthesis of CNTs with totally hollow channels and/or totally copper filled nanowires.

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Authors and Affiliations

  1. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, P.R. China

    Q. Zhang, W.Z. Qian, H. Yu, F. Wei & Q. Wen

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  1. Q. Zhang
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  2. W.Z. Qian
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  3. H. Yu
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  4. F. Wei
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  5. Q. Wen
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Correspondence to W.Z. Qian.

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PACS

81.07.De; 82.33.Ya

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Zhang, Q., Qian, W., Yu, H. et al. Synthesis of carbon nanotubes with totally hollow channels and/or with totally copper filled nanowires. Appl. Phys. A 86, 265–269 (2007). https://doi.org/10.1007/s00339-006-3770-2

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  • DOI: https://doi.org/10.1007/s00339-006-3770-2

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