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Thermal stability of carbon nanotubes probed by anchored tungsten nanoparticles.

Journal Article


Abstract


  • The thermal stability of multiwalled carbon nanotubes (CNTs) was studied in high vacuum using tungsten nanoparticles as miniaturized thermal probes. The particles were placed on CNTs inside a high-resolution transmission electron microscope equipped with a scanning tunneling microscope unit. The setup allowed manipulating individual nanoparticles and heating individual CNTs by applying current to them. CNTs were found to withstand high temperatures, up to the melting point of 60-nm-diameter W particles (���3400 K). The dynamics of W particles on a hot CNT, including particle crystallization, quasimelting, melting, sublimation and intradiffusion, were observed in real time and recorded as a video. Graphite layers reel off CNTs when melted or premelted W particles revolve along the tube axis.

Publication Date


  • 2011

Citation


  • Wei, X., Wang, M. -S., Bando, Y., & Golberg, D. (2011). Thermal stability of carbon nanotubes probed by anchored tungsten nanoparticles.. Science and technology of advanced materials, 12(4), 044605. doi:10.1088/1468-6996/12/4/044605

Web Of Science Accession Number


Start Page


  • 044605

Volume


  • 12

Issue


  • 4

Place Of Publication


Abstract


  • The thermal stability of multiwalled carbon nanotubes (CNTs) was studied in high vacuum using tungsten nanoparticles as miniaturized thermal probes. The particles were placed on CNTs inside a high-resolution transmission electron microscope equipped with a scanning tunneling microscope unit. The setup allowed manipulating individual nanoparticles and heating individual CNTs by applying current to them. CNTs were found to withstand high temperatures, up to the melting point of 60-nm-diameter W particles (���3400 K). The dynamics of W particles on a hot CNT, including particle crystallization, quasimelting, melting, sublimation and intradiffusion, were observed in real time and recorded as a video. Graphite layers reel off CNTs when melted or premelted W particles revolve along the tube axis.

Publication Date


  • 2011

Citation


  • Wei, X., Wang, M. -S., Bando, Y., & Golberg, D. (2011). Thermal stability of carbon nanotubes probed by anchored tungsten nanoparticles.. Science and technology of advanced materials, 12(4), 044605. doi:10.1088/1468-6996/12/4/044605

Web Of Science Accession Number


Start Page


  • 044605

Volume


  • 12

Issue


  • 4

Place Of Publication