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Janus Nanomembranes: A Generic Platform for Chemistry in Two Dimensions


  • We thank the Volkswagenstiftung and the Deutsche Forschungsgemeinschaft (SFB 613) for financial support. This work partly results from participation in the COST Action CM0601, “Electron Controlled Chemical Lithography” (ECCL). We thank Matthias Büenfeld, Tobias Klamp, and Mark Schnietz for their assistance with experimental setups.


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Buttered side up: A one nanometer thick membrane with different functional groups on each side was fabricated from self-assembled monolayers of aromatic molecules. The amino side of this Janus membrane was modified with tetramethylrhodamine (TMR) fluorescent dye, and the thiol side with ATTO647N (see picture). The functionalization and functionality of the nanomembrane were demonstrated by X-ray photoelectron spectroscopy and fluorescence microscopy.

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