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Fullerene-based anchoring groups for molecular electronics.

Christian A Martin1, Dapeng Ding, Jakob Kryger Sørensen

  • 1Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands. martin@physics.leidenuniv.nl

Journal of the American Chemical Society
|September 16, 2008
PubMed
Summary
This summary is machine-generated.

We developed a new fullerene anchoring group for molecular electronics. This fullerene-based molecule shows stable single-molecule junctions with lower conductance spread than traditional anchoring groups.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Molecular electronics aims to use single molecules as electronic components.
  • Developing stable anchoring groups is crucial for reliable molecular junctions.
  • Fullerene derivatives offer unique electronic and structural properties.

Purpose of the Study:

  • To introduce and characterize a novel fullerene-based anchoring group for molecular electronics.
  • To evaluate the conductance and stability of single-molecule junctions formed by this new molecule.
  • To compare its performance against established anchoring groups like 1,4-benzenedithiol and 1,4-benzenediamine.

Main Methods:

  • Fabrication of single-molecule junctions using lithographic mechanically controllable break junctions in vacuum.
  • Self-assembly of the fullerene-based molecule from solution onto electrodes.
  • Conductance measurements at low bias.
  • Statistical analysis of junction breaking events and histogram analysis.

Main Results:

  • The fullerene-anchored molecule self-assembles into stable single-molecule junctions.
  • A low-bias conductance of 3 x 10(-4) G0 was measured.
  • Significantly lower conductance spread compared to 1,4-benzenedithiol.
  • More significant signature in histograms than 1,4-benzenediamine, indicating a more stable adsorption.

Conclusions:

  • The new fullerene-based anchoring group provides a stable and effective motif for molecular electronics.
  • It offers advantages in terms of conductance stability and adsorption robustness over existing molecules.
  • This work paves the way for advanced molecular electronic devices utilizing fullerene anchors.