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Nanoscale Surface Creasing Induced by Post-polymerization Modification.

Karson Durie¹, Mir Jalil Razavi¹, Xianqiao Wang¹

¹Department of Chemistry, College of Engineering, and the Center for Nanoscale Science and Engineering, University of Georgia , Athens, Georgia 30602, United States.

|October 24, 2015

Summary

This summary is machine-generated.

Researchers developed a method to create reproducible nanoscale surface instabilities in soft polymeric films using reactive microcontacting printing. This technique allows for controlled fabrication of nanoscale creases for novel material applications.

Keywords:

nanoscale creasing polymer brushes post-polymerization modification

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Nanosponge Tunability in Size and Crosslinking Density

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Area of Science:

Materials Science
Polymer Science
Nanotechnology

Background:

Creasing in soft polymeric films arises from compressive stresses, leading to material failure.
Engineered instabilities in soft materials offer potential for advanced applications like particle sorting and responsive interfaces.

Purpose of the Study:

To present a reproducible method for fabricating nanoscale surface instabilities.
To demonstrate control over crease size and structure through material and process parameters.

Main Methods:

Utilized reactive microcontacting printing (μCP) on poly(pentafluorophenyl acrylate) polymer brush layers.
Modified polymer side chains to induce in-plane film growth and generate stress.
Varied brush grafting density and μCP pressure to modulate crease characteristics.

Main Results:

Successfully fabricated reproducible nanoscale creases on polymer surfaces.
Demonstrated that crease size and structure are tunable via grafting density and applied pressure.
Linked nanoscale crease formation to in-plane film growth induced by post-polymerization modification.

Conclusions:

Developed a controllable method for creating nanoscale surface instabilities in soft polymers.
Showcased the potential of programmed instabilities for advanced material functionalities.
Highlighted the role of stress generation and confinement in fabricating nanoscale creases.