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Related Experiment Videos

Nanoparticle arrays patterned by electron-beam writing: structure, composition, and electrical properties.

Jose L Plaza1, Yu Chen, Susanne Jacke

  • 1Nanoscale Physics Research Laboratory, School of Physics and Astronomy, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.

Langmuir : the ACS Journal of Surfaces and Colloids
|February 9, 2005
PubMed
Summary
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Direct electron beam writing creates carbon-sheathed gold nanowires from nanoparticle films. This method enables the electrical addressing of patterned nanoparticle arrays for electronic applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electron Microscopy

Background:

  • Nanoparticle films offer potential for novel electronic devices.
  • Precise fabrication of nanoscale conductive structures is a key challenge.
  • Direct electron beam writing provides high-resolution patterning capabilities.

Purpose of the Study:

  • To investigate the direct electron beam writing of nanowires in nanoparticle films.
  • To characterize the morphology and composition of the fabricated nanowires.
  • To explore the electrical properties and potential applications of these nanostructures.

Main Methods:

  • Direct electron beam writing on nanoparticle films deposited on SiO(2)/Si wafers.
  • Atomic Force Microscopy (AFM), Scanning Electron Microscopy (SEM), and Energy-Dispersive X-ray spectroscopy (EDX) for characterization.

Related Experiment Videos

  • Z-contrast Scanning Transmission Electron Microscopy (STEM) for core structure analysis.
  • Conductivity measurements to determine electrical properties.

    • Main Results:

    • Fabrication of nanoscale wires between gold electrodes using electron beam lithography.
    • Characterization revealed a core/sheath structure: a gold-rich core within a carbon-rich sheath.
    • STEM imaging showed metal cores embedded in a carbon network, suggesting ligand cross-linking.
    • High resistivities were measured, consistent with the proposed network structure.

    Conclusions:

    • Direct electron beam writing is effective for creating core/sheath nanowires from nanoparticle films.
    • The process involves cross-linking of nanoparticle ligands, forming a conductive carbon network.
    • The study demonstrates the ability to generate electrically addressable patterned nanoparticle arrays.