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Related Experiment Video

Updated: Nov 6, 2025

Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold

Fabrication of a Bioactive, PCL-based "Self-fitting" Shape Memory Polymer Scaffold

Published on: October 23, 2015

Harnessing Wrinkling Patterns Using Shape Memory Polymer Microparticles.

Wenbing Li^1,2, Yanju Liu³, Jinsong Leng¹

¹Centre for Composite Materials and Structures, Harbin Institute of Technology (HIT), No. 2 YiKuang Street, P.O. Box 3011, Harbin 150080, PR China.

ACS Applied Materials & Interfaces

|May 5, 2021

Summary

This summary is machine-generated.

Shape memory polymers (SMPs) provide a novel substrate for creating tunable surface wrinkles. Gold nanoparticle films on these polymers form diverse wrinkle patterns when triggered by heat or toluene.

Keywords:

Janus particles actuation methods polystyrene microparticles shape memory wrinkle patterns

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Micropunching Lithography for Generating Micro- and Submicron-patterns on Polymer Substrates

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Published on: July 2, 2012

Area of Science:

Materials Science
Polymer Science
Nanotechnology

Background:

Shape memory polymers (SMPs) are ideal soft substrates for bilayer wrinkle systems due to their shape fixity and recovery.
Existing wrinkle systems often lack facile control over pattern morphology and programmability.

Purpose of the Study:

To program large compressive strains in polystyrene (PS) microparticles using nanoimprint lithography.
To develop a cost-effective method for creating tunable surface wrinkles using SMPs and gold nanoparticle (Au NP) films.
To investigate the mechanisms of wrinkle evolution and control surface morphology via different stimuli and material properties.

Main Methods:

Chemical cross-linking of polystyrene (PS) microparticles.
Programming compressive strains via nanoimprint lithography.
Fabrication of bilayer systems with Au NP films as the top layer on PS substrates.
Triggering wrinkle formation using direct heating and toluene vapors.
Tuning wrinkle characteristics by varying Au NP thickness and stimulation methods.

Main Results:

Successfully programmed large compressive strains in PS microparticles.
Demonstrated the formation of diverse wrinkle structures on recovered PS particles when coated with Au NP films.
Investigated and elucidated the evolution mechanisms of wrinkling under different stimuli.
Tuned wrinkle amplitude, wavelength, and morphology by controlling Au NP thickness and stimulation methods.

Conclusions:

This study presents a cost-effective approach to realize programmable surface wrinkling using SMPs.
The presented concept offers a versatile platform for surface pattern generation with tunable characteristics.
The methodology can be extended to other shape memory polymers for diverse applications.