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Related Experiment Video

Updated: Jul 19, 2026

Preparation and Characterization of C60/Graphene Hybrid Nanostructures
08:40

Preparation and Characterization of C60/Graphene Hybrid Nanostructures

Published on: May 15, 2018

C60 on SiC nanomesh.

Wei Chen1, Hong Liang Zhang, Hai Xu

  • 1Nanoscience and Nanotechnology Initiative, National University of Singapore, 2 Science Drive 3, 117542, Singapore. nnicw@nus.edu.sg

The Journal of Physical Chemistry. B
|October 27, 2006
PubMed
Summary

A silicon carbide (SiC) nanomesh acts as a template for C60 molecule growth. This study reveals C60 molecules form distinct layers and structures on the SiC nanomesh, with unique electronic contrasts in the initial layer.

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Area of Science:

  • Materials Science
  • Surface Science
  • Nanotechnology

Background:

  • Epitaxial growth of molecular thin films is crucial for advanced electronic and optical devices.
  • Understanding the self-assembly of fullerenes on nanostructured surfaces provides insights into molecular ordering and interface phenomena.

Purpose of the Study:

  • To investigate the epitaxial growth mode of C60 molecules on a SiC nanomesh template at room temperature.
  • To characterize the structural evolution and molecular arrangements of C60 films with varying coverage.
  • To explore the origin of molecular contrast observed in scanning tunneling microscopy (STM) images.

Main Methods:

  • In situ scanning tunneling microscopy (STM) was employed to observe the growth process in real-time.
  • Varying coverages of C60 molecules were deposited onto the SiC nanomesh.

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  • Annealing experiments were performed to assess the reversibility of the C60 film formation.

    • Main Results:

    • The growth followed a Stranski-Krastanov mode, transitioning from layer-by-layer growth to island formation.
    • At 1 ML coverage, a complete hexagonal close-packed C60 wetting layer formed.
    • At higher coverages (>4.5 ML), a face-centered-cubic (fcc) structure oriented along (111) was observed.
    • Unique bright and dim molecular contrasts were seen in the first C60 layer, attributed to electronic effects, disappearing in subsequent layers.
    • The C60 film could be removed by annealing at 200°C.

    Conclusions:

    • SiC nanomesh effectively templates C60 epitaxy, enabling controlled molecular assembly.
    • The observed growth mode and structural transitions are sensitive to C60 coverage and substrate interaction.
    • The distinct molecular contrasts in the first layer highlight unique electronic properties at the C60/SiC interface, offering potential for novel electronic applications.