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Photocontrollable Wrinkle Morphology Evolution on Azo-Based Multilayers for Hierarchical Surface Micropatterns
Chuanyong Zong1, Umair Azhar1, Chunhua Zhou1
1Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials, School of Chemistry and Chemical Engineering , University of Jinan , Jinan 250022 , P. R. China.
Langmuir : the ACS Journal of Surfaces and Colloids
|January 26, 2019
Summary
Scientists developed a new method using light to control surface wrinkling in layered materials. This allows for the creation of complex, light-responsive patterns on surfaces for advanced material design.
Area of Science:
- Materials Science
- Surface Engineering
- Polymer Science
Background:
- Self-organized wrinkling in layered materials is crucial for designing functional devices.
- Controlling wrinkle morphology is key to harnessing these behaviors for engineering applications.
Purpose of the Study:
- To develop a facile and effective strategy for regulating wrinkle morphology evolution in azobenzene-based laminated multilayers.
- To investigate the influence of visible-light irradiation on hierarchical surface micropattern formation.
- To understand the role of intermediate photoinert layers in photocontrolled wrinkling.
Main Methods:
- Utilizing visible-light irradiation to trigger reversible photoisomerization in azobenzene films.
- Systematic experimental analysis of wrinkle morphology evolution under controlled light exposure.
- Employing intermediate layers such as polystyrene and SiO x to modulate wrinkling behavior.
Main Results:
- Visible-light irradiation effectively controlled wrinkle morphology and hierarchical micropattern formation.
- Intermediate layers influenced wrinkle evolution through reinforcing or stress-relaxation effects.
- Selective light exposure resulted in distinct wrinkle patterns: highly oriented in unexposed areas and erased or smaller-wavelength in exposed areas.
Conclusions:
- A novel photocontrolled strategy for fabricating hierarchical stimulus-responsive surface patterns was demonstrated.
- The study provides insights into the morphological evolution of wrinkling composites, inspired by natural phenomena.
- This approach offers convenient and controllable realization of dynamic surface patterns for advanced material applications.
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