Saddles as rotational locks within shape-assisted self-assembled nanosheets
Joseph F Woods1, Lucía Gallego1, Amira Maisch1
1Department of Chemistry, University of Zurich, 8057, Zurich, Switzerland.
Nature Communications
|August 7, 2023
Summary
Shape-assisted self-assembly guides molecules into ordered two-dimensional (2D) materials. This method uses molecular shape to control interactions, creating highly ordered crystalline and soft materials for advanced applications.
Area of Science:
- Materials Science
- Nanotechnology
- Supramolecular Chemistry
Background:
- Two-dimensional (2D) materials are crucial for numerous modern applications.
- Self-assembly, often relying on strong directional bonds, is a key fabrication method.
- Controlling less directional forces for ordered material formation remains challenging.
Purpose of the Study:
- To demonstrate shape-assisted self-assembly as a method for creating highly ordered 2D materials.
- To investigate how topography and molecular shape influence self-assembly processes.
- To verify the consistency and effectiveness of shape-guided self-assembly across various derivatives.
Main Methods:
- Utilizing topography as a guiding principle to enhance intermolecular forces.
- Employing molecular curvature to govern angle distribution and monomer arrangement.
- Verification through a diverse combination of solid-state analyses.
Main Results:
- Shape-assisted self-assembly successfully restricts rotational motion of monomers.
- Molecular curvature directs monomers into columns, which then form ordered 2D structures.
- Long-range order was observed in both crystalline and soft materials fabricated via this method.
Conclusions:
- Molecular shape is a critical design principle for achieving precise self-assembly.
- Shape-assisted self-assembly offers a robust route to fabricating highly ordered 2D materials.
- This approach facilitates the inception of novel materials with tailored properties.
