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Self-assembling Morphologies Obtained from Helical Polycarbodiimide Copolymers and Their Triazole Derivatives

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Surface-directed spinodal decomposition on morphologically patterned substrates.

Prasenjit Das^1,2, Prabhat K Jaiswal³, Sanjay Puri²

¹Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel.

Physical Review. E

|October 20, 2020

Summary

This summary is machine-generated.

This study explores surface-directed spinodal decomposition (SDSD) on patterned substrates. Morphological evolution is driven by interfering SDSD waves from substrate surfaces, offering insights into phase separation dynamics.

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Area of Science:

Materials Science
Chemical Engineering
Physics

Background:

Surface-directed spinodal decomposition (SDSD) involves phase separation influenced by substrate wetting properties.
Previous work examined SDSD on flat, chemically heterogeneous substrates.
Patterned substrates are crucial for various technological applications.

Purpose of the Study:

To theoretically understand SDSD on chemically homogeneous, morphologically patterned substrates.
To investigate the influence of substrate topography on phase separation kinetics.
To provide a framework for designing materials with controlled microstructures.

Main Methods:

Numerical simulations were employed to model the phase separation process.
The study focused on domain growth dynamics within and above substrate grooves.
Analysis involved examining the interference of surface-directed spinodal decomposition waves.

Main Results:

Detailed numerical results illustrate domain growth patterns influenced by substrate morphology.
Morphological evolution is explained by the interaction of SDSD waves from different substrate surfaces.
The study quantifies the impact of groove geometry on phase separation.

Conclusions:

Substrate morphology significantly directs phase separation kinetics in SDSD.
Interference of SDSD waves provides a mechanism for understanding pattern formation.
This research offers theoretical guidance for utilizing patterned surfaces in materials design.