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Intercalation-Directed Programming of Nanomechanics and Mesoscale Topology
Ou Wang1, Qingyuan Yao1, Zongze Zhang1
1Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P.R. China.
Journal of the American Chemical Society
|April 15, 2026
Summary
Researchers developed a self-assembly strategy using snowflake-shaped molecules to create complex, tunable materials. This method controls topology and mechanical properties, enabling diverse structures with adjustable chiroptical responses.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Chemical Engineering
Background:
- Creating complex, multi-scale structures is a significant challenge in chemistry and materials science.
- Existing methods often lack precise control over the resulting material's topology and properties.
Purpose of the Study:
- To introduce a novel self-assembly strategy for designing topologically intricate architectures.
- To achieve concurrent control over the topology, mechanical stiffness, and chiroptical response of materials.
- To demonstrate a universal pathway applicable to molecular, hybrid, and inorganic systems.
Main Methods:
- Utilized snowflake-shaped molecular building blocks for self-assembly.
- Employed a molecular intercalation approach to tune fibril-fibril interactions.
- Investigated the resulting material's topology, elastic modulus, and chiroptical properties under geometric confinement.
Main Results:
- Successfully modulated the elastic modulus over two orders of magnitude (GPa to MPa).
- Achieved diverse topological transformations, including toroids, figure-eight, and supercoiled architectures.
- Demonstrated continuous tuning of chiroptical properties and chirality inversion via excitonic coupling.
Conclusions:
- The dual self-assembly and intercalation strategy provides precise control over material topology and mechanics.
- This approach enables the design of complex structures with tunable chiroptical functionalities.
- The strategy offers a versatile platform for advanced materials design beyond molecular systems.
