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Targeting 2D Nanostructures in Phase-Separated Materials through Molecular Design.
Martin H C van Son1, Bart W L van den Bersselaar1, Bas F M de Waal1
1Laboratory of Macromolecular and Organic Chemistry and Institute for Complex Molecular Systems, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands.
Macromolecules
|March 31, 2025
Summary
Researchers explored how molecular design influences self-assembling 2D nanostructures. Tailoring molecular architecture and pendant chains reliably controls lamellar or columnar morphologies in oligomeric materials for advanced applications.
Area of Science:
- Materials Science
- Polymer Chemistry
- Nanotechnology
Background:
- Oligomeric materials with no molar mass dispersity offer precise molecular-level definition.
- These materials spontaneously form sub-10 nm 2D nanostructures with unique properties, particularly for photophysical applications.
- Predicting the resulting nanostructure morphologies from molecular design remains a significant challenge.
Purpose of the Study:
- To systematically investigate how molecular architecture and pendant chains affect spontaneously phase-separated nanostructures.
- To establish design principles for controlling 2D nanostructure formation in oligomeric materials.
- To enable the development of novel materials for applications like nanoscale optoelectronics.
Main Methods:
- Synthesis of 20 distinct oligomeric molecules.
- Inclusion of discrete oligodimethylsiloxane (oDMS) segments and four different crystalline units.
- Systematic variation of molecular architecture and pendant chain substituents.
Main Results:
- Lamellar morphologies were reliably achieved with telechelic and head-tail architectures featuring symmetric peripheral crystalline blocks.
- Columnar morphologies were predominantly observed for symmetric architectures with asymmetric cores and for core-centered architectures.
- Demonstrated a clear correlation between molecular design parameters and the resulting 2D nanostructures.
Conclusions:
- Molecular architecture and pendant chain engineering are critical for controlling self-assembly into specific 2D nanostructures.
- The study provides a systematic framework for designing oligomeric materials with predictable morphologies.
- Findings facilitate the advancement of materials for nanoscale optoelectronics and other advanced applications.
