Azobenzene on Cu(110): adsorption site-dependent diffusion |
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Authors: | Miwa Jill A Weigelt Sigrid Gersen Henkjan Besenbacher Flemming Rosei Federico Linderoth Trolle R |
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Institution: | Institut National de la Recherche Scientifique-Energie, Matériaux et Télécommunications, Université du Québec, Varennes, Québec J3X 1S2, Canada. |
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Abstract: | Azobenzene and its derivatives can undergo reversible trans-cis isomerizations when irradiated with light, making them potential candidates for optically sensitive materials and devices. The adsorption and diffusion of azobenzene on the Cu(110) surface was investigated with a variable-temperature scanning tunneling microscope. The trans-isomer was observed and found to occupy two adsorption geometries-an energetically stable and a metastable state. Diffusion occurred along the closed-packed 1 -1 0] direction of the surface, and the diffusivity for the two adsorption states was found to differ by approximately 1 order of magnitude. |
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