Saddles as rotational locks within shape-assisted self-assembled nanosheets

Joseph F. Woods, Lucía Gallego, Amira Maisch, Dominik Renggli, Corrado Cuocci, Olivier Blacque, Gunther Steinfeld, Andres Kaech, Bernhard Spingler, Andreas Vargas Jentzsch and Michel Rickhaus ()
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Joseph F. Woods: University of Zurich
Lucía Gallego: University of Zurich
Amira Maisch: University of Zurich
Dominik Renggli: University of Zurich
Corrado Cuocci: Institute of Crystallography, CNR
Olivier Blacque: University of Zurich
Gunther Steinfeld: ELDICO Scientific AG
Andres Kaech: University of Zurich
Bernhard Spingler: University of Zurich
Andreas Vargas Jentzsch: University of Strasbourg, Institut Charles Sadron, CNRS
Michel Rickhaus: University of Zurich

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Two-dimensional (2D) materials are a key target for many applications in the modern day. Self-assembly is one approach that can bring us closer to this goal, which usually relies upon strong, directional interactions instead of covalent bonds. Control over less directional forces is more challenging and usually does not result in as well-defined materials. Explicitly incorporating topography into the design as a guiding effect to enhance the interacting forces can help to form highly ordered structures. Herein, we show the process of shape-assisted self-assembly to be consistent across a range of derivatives that highlights the restriction of rotational motion and is verified using a diverse combination of solid state analyses. A molecular curvature governed angle distribution nurtures monomers into loose columns that then arrange to form 2D structures with long-range order observed in both crystalline and soft materials. These features strengthen the idea that shape becomes an important design principle leading towards precise molecular self-assembly and the inception of new materials.

Date: 2023
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DOI: 10.1038/s41467-023-40475-8

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