Azobenzene-containing monolayer with photoswitchable wettability |
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Authors: | Delorme N Bardeau J-F Bulou A Poncin-Epaillard F |
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Institution: | Laboratoire de Physique de l'Etat Condensé (CNRS, UMR 6087) and Laboratoire Polymères, Collo?des et Interfaces (CNRS, UMR 6120), Université du Maine, Avenue O. Messiaen, 72085 Le Mans Cedex 09, France. |
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Abstract: | A compact monolayer containing azobenzene has been prepared on silicon substrates. The elaboration route consisted of covalent grafting of freshly synthesized azobenzene moieties onto an isocyanate-functionalized self-assembled monolayer (SAM). The highly packed and ordered isocyanate-functionalized SAM and the azobenzene-functionalized SAM were monitored and characterized by contact angle measurements and X-ray reflectivity (XR). Photoswitching of the wettability of the film induced by the reversible cis-trans isomerization of the azobenzene chromophores is experimentally shown from water and olive oil contact angle measurements. |
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