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Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
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Fullerene interaction with carbon nanohorns.

Irene Suarez-Martinez1, Marc Monthioux, Christopher P Ewels

  • 1IMN, CNRS UMR6502, 2 Rue de la Houssiniere, BP 32229, 44322 Nantes, France.

Journal of Nanoscience and Nanotechnology
|November 14, 2009
PubMed
Summary

Carbon buckminsterfullerene (C60) interacts differently with carbon nanohorns based on location. Inside nanohorns, C60 binds strongly due to dispersion forces, while outside binding is weak and angle-independent.

Area of Science:

  • Materials Science
  • Computational Chemistry
  • Nanotechnology

Background:

  • Carbon nanohorns and buckminsterfullerene (C60) are novel carbon nanomaterials with unique structural and electronic properties.
  • Understanding their interactions is crucial for designing advanced carbon-based nanostructures and devices.

Purpose of the Study:

  • To theoretically investigate the interaction between C60 and carbon nanohorns with varying tip angles.
  • To analyze C60 attachment to both interior and exterior surfaces of nanohorns.
  • To determine the influence of cone angle and dispersion forces on binding energies and interactions.

Main Methods:

  • Density Functional Theory (DFT) with the Local Density Approximation (LDA) was employed for calculations.
  • Dispersion forces were independently considered using a numerical potential.

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  • A range of cone angles, from flat graphene to 20 degrees, were simulated.

    • Main Results:

    • Weak binding of C60 to the exterior nanocone wall (0.5-0.9 eV) with no trend in cone angle.
    • Significantly stronger binding of C60 inside nanohorns (> 3 eV) due to dispersion forces.
    • Increased binding energy inside cones with a higher number of pentagons in the tip.

    Conclusions:

    • C60 exhibits distinct binding behaviors on the exterior versus interior of carbon nanohorns.
    • Dispersion forces play a critical role in the strong internal binding of C60.
    • C60 molecules are expected to rotate freely below liquid nitrogen temperatures and experience directional forces relative to the nanohorn tip.