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Coordinated Responsive Arrays of Surface-Linked Polymer Islands-CORALs
Oleg Davydovich1, Elza Chu1, Zachary Friar1
1Department of Chemistry & Biochemistry, University of the Sciences , Philadelphia, Pennsylvania 19104, United States.
ACS Applied Materials & Interfaces
|February 7, 2018
Summary
Researchers developed polymer CORALs, responsive surface-linked islands that reversibly cover or reveal substrates. This fabrication method uses block copolymer microphase separation for tunable surface properties.
Area of Science:
- Materials Science
- Polymer Chemistry
- Surface Science
Background:
- Responsive materials are crucial for tunable surface properties.
- Existing methods for creating switchable surfaces often lack efficiency or scalability.
- Block copolymers offer versatile platforms for designing self-assembling nanostructures.
Purpose of the Study:
- To introduce co-ordinated responsive arrays of surface-linked islands (polymer CORALs).
- To develop a convenient fabrication method for polymer CORALs.
- To investigate the responsive behavior and switching mechanism of polymer CORALs.
Main Methods:
- Fabrication via microphase separation in thin films of supramolecular block copolymer assemblies.
- Characterization using atomic force microscopy (AFM) and grazing incidence small-angle X-ray scattering (GISAXS).
- Simulation using coarse-grained molecular dynamics (CGMD).
Main Results:
- Demonstrated successful fabrication of polymer CORALs with high grafting density and small lateral island separation.
- Observed reversible switching between a fully covered (relaxed) state in good solvent and a revealed substrate (compact) state in weak solvent.
- Characterized the morphology and switching dynamics using AFM, GISAXS, and CGMD simulations.
Conclusions:
- Polymer CORALs offer a novel approach to creating switchable surfaces.
- The proposed fabrication method is convenient and relies on well-established polymer self-assembly principles.
- The study provides fundamental insights into the structure-property relationships governing the responsive behavior of polymer CORALs.
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