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Azobenzene on Cu(110): adsorption site-dependent diffusion.

Jill A Miwa1, Sigrid Weigelt, Henkjan Gersen

  • 1Institut National de la Recherche Scientifique-Energie, Matériaux et Télécommunications, Université du Québec, Varennes, Québec J3X 1S2, Canada.

Journal of the American Chemical Society
|March 9, 2006
PubMed
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Azobenzene

Area of Science:

  • Surface science
  • Materials science
  • Photochemistry

Background:

  • Azobenzene derivatives exhibit light-induced reversible trans-cis isomerization.
  • This property makes them suitable for optically sensitive materials and devices.

Purpose of the Study:

  • Investigate the adsorption and diffusion of azobenzene on a copper (Cu)(110) surface.
  • Characterize the adsorption geometries and diffusion behavior of azobenzene.

Main Methods:

  • Utilized variable-temperature scanning tunneling microscopy (STM).
  • Analyzed azobenzene adsorption and diffusion dynamics on Cu(110).

Main Results:

  • Observed the trans-isomer of azobenzene.
  • Identified two adsorption geometries: a stable and a metastable state.

Related Experiment Videos

  • Diffusion occurred along the [1 -1 0] direction with differing diffusivities for the two states (approx. 1 order of magnitude difference).

    • Conclusions:

    • Azobenzene exhibits distinct adsorption states on Cu(110).
    • Diffusion dynamics are dependent on the adsorption geometry.
    • Understanding these behaviors is crucial for developing azobenzene-based optical devices.