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Y-junction multibranched carbon nanofibers.

Maheshwar Sharon1, Debabrata Pradhan

  • 1Nanotechnology Research Laboratory, Birla College, Kalyan, Mumbai, India.

Journal of Nanoscience and Nanotechnology
|October 26, 2005
PubMed
Summary

Multibranched carbon nanofibers (CNFs) were synthesized using thermal chemical vapor deposition. Nickel catalysts yielded branched CNFs, while cobalt catalysts produced spherical carbon beads, indicating distinct growth mechanisms.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Carbon nanomaterials, including carbon nanofibers (CNFs), exhibit unique properties for diverse applications.
  • Controlling the morphology and growth mechanism of carbon nanomaterials is crucial for tailoring their performance.
  • Catalyst selection significantly influences the structure and growth pathways of synthesized carbon nanostructures.

Purpose of the Study:

  • To investigate the synthesis of multibranched carbon nanofibers (CNFs) using a thermal chemical vapor deposition (CVD) method.
  • To explore the effect of different catalysts (nickel and cobalt) on the morphology of carbon nanomaterials.
  • To elucidate the growth mechanism of the synthesized carbon nanostructures.

Main Methods:

  • Multibranched carbon nanofibers (CNFs) were produced via thermal chemical vapor deposition (CVD).
  • Camphor was utilized as the carbon precursor.
  • Nickel and cobalt catalysts were deposited on a silicon substrate using e-beam evaporation.

Main Results:

  • Branched carbon nanofibers (CNFs) were successfully grown on a nickel thin film at 900°C.
  • Spherical carbon beads were formed on a cobalt thin film under identical conditions.
  • The carbon nanofibers exhibited a base growth mechanism, with no catalyst particles observed at the fiber tips.

Conclusions:

  • Nickel and cobalt catalysts promote distinct growth morphologies (branched nanofibers vs. spherical beads) in carbon nanomaterials synthesized by thermal CVD.
  • The observed base growth mechanism for carbon nanofibers suggests catalyst-substrate interactions play a key role.
  • This study provides insights into catalyst-dependent growth mechanisms for carbon nanomaterial fabrication.

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