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Densely Packed Tethered Polymer Nanoislands: A Simulation Study.

Nicolas Chen¹, Oleg Davydovich², Caitlyn McConnell¹

¹Department of Chemistry & Biochemistry, University of the Sciences in Philadelphia, Philadelphia, PA 19104, USA.

|August 10, 2021

Summary

We characterized polymer chains within COordinated Responsive Arrays of Surface-Linked polymer islands (CORALS). Chain structure varies based on island size and position, impacting interfacial properties.

Keywords:

polymers simulation surfaces

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Area of Science:

Polymer Science
Materials Science
Surface Chemistry

Background:

COordinated Responsive Arrays of Surface-Linked polymer islands (CORALS) enable novel molecular surfaces with switchable properties.
CORALS consist of uniformly distributed polymer nanoislands separated by bare surface regions.
Understanding polymer chain behavior within these nanoislands is crucial for CORAL functionality.

Purpose of the Study:

To characterize the structural features of nanoislands and semiflexible polymers within CORALS.
To elucidate how polymer chain morphology varies with island size and radial position.
To provide insights for the rational design of CORALs with tailored interfacial characteristics.

Main Methods:

Structural characterization of polymer nanoislands and constituent chains.
Analysis of polymer chain behavior as a function of island size and distance from the island center.
Investigating the influence of neighboring chains and island periphery effects.

Main Results:

Grafted semiflexible polymer chains exhibit distinct structural characteristics based on their location within the nanoisland.
Chains at the island periphery resemble isolated tethered flexible chains.
Chains at the island center display characteristics similar to polymer brushes due to neighbor effects, with intermediate structures at the periphery.

Conclusions:

Polymer chain morphology within CORAL nanoislands is spatially dependent, creating distinct interfacial regimes.
These findings are critical for designing CORALs with predictable responses to external stimuli.
Understanding these structure-property relationships can lead to diverse applications in responsive materials systems.