Supramolecular architectures of molecularly thin yet robust free-standing layers

Mina Moradi, Nadia L. Opara, Ludovico G. Tulli, Christian Wäckerlin, Scott J. Dalgarno, Simon J. Teat, Milos Baljozovic, Olha Popova, Eric van Genderen, Armin Kleibert, Henning Stahlberg, Jan Pieter Abrahams, Celestino Padeste, Philippe F.-X. Corvini, Thomas A. Jung, Patrick Shahgaldian

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Abstract

Stable, single-nanometer thin, and free-standing two-dimensional layers with controlled molecular architectures are desired for several applications ranging from (opto-)electronic devices to nanoparticle and single-biomolecule characterization. It is, however, challenging to construct these stable single molecular layers via self-assembly, as the cohesion of those systems is ensured only by in-plane bonds. We herein demonstrate that relatively weak noncovalent bonds of limited directionality such as dipole-dipole (–CNNC–) interactions act in a synergistic fashion to stabilize crystalline monomolecular layers of tetrafunctional calixarenes. The monolayers produced, demonstrated to be freestanding, display a well-defined atomic structure on the single-nanometer scale and are robust under a wide range of conditions including photon and electron radiation. This work opens up new avenues for the fabrication of robust, single-component, and free-standing layers via bottom-up self-assembly.
Original languageEnglish
Article numbereaav4489
JournalScience Advances
Volume5
Issue number2
DOIs
Publication statusPublished - 22 Feb 2019

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    Moradi, M., Opara, N. L., Tulli, L. G., Wäckerlin, C., Dalgarno, S. J., Teat, S. J., Baljozovic, M., Popova, O., van Genderen, E., Kleibert, A., Stahlberg, H., Abrahams, J. P., Padeste, C., Corvini, P. F-X., Jung, T. A., & Shahgaldian, P. (2019). Supramolecular architectures of molecularly thin yet robust free-standing layers. Science Advances, 5(2), [eaav4489]. https://doi.org/10.1126/sciadv.aav4489