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Phase behavior of symmetric disk-coil macromolecules with stacking interactions
YongJoo Kim1, Alfredo Alexander-Katz
1Department of Materials Science and Engineering, MIT, Cambridge, Massachusetts 02139, USA.
The Journal of Chemical Physics
|July 20, 2011
Summary
We explored disk-coil macromolecule self-assembly with stacking interactions. New ordered phases, including cylinders with super-aligned disks, emerged, offering potential for organic optoelectronics.
Area of Science:
- Materials Science
- Computational Chemistry
- Polymer Physics
Background:
- Disk-coil macromolecules are complex polymers with potential applications.
- Understanding their self-assembly is crucial for materials design.
- Previous studies identified basic phases but lacked detailed analysis of stacking interactions.
Purpose of the Study:
- To investigate the self-assembly of disk-coil macromolecules incorporating stacking interactions.
- To explore the resulting phase diagram and identify novel self-assembled structures.
- To evaluate the impact of disk-disk attractive forces on macromolecular organization.
Main Methods:
- Monte Carlo simulations were performed using the NPT ensemble.
- Disk-coil molecules with disk-coil amphiphilic and disk-disk stacking interactions were modeled.
- The phase behavior was mapped as a function of interaction parameters.
Main Results:
- A complex phase diagram was revealed, highly dependent on stacking interactions.
- New ordered phases were discovered, including ordered lamellar, ordered perforated lamellar, cylinder, and ordered cylinder phases.
- The ordered phases exhibit a strong tendency for parallel disk packing, with ordered cylinders showing super-aligned structures.
Conclusions:
- Stacking interactions significantly influence the self-assembly of disk-coil macromolecules.
- Novel ordered phases, particularly the ordered cylinder phase, present promising structures for applications.
- The super-aligned structures in ordered cylinders could be beneficial for organic optoelectronic devices.
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