Photo‐Triggered Shape Reconfiguration in Stretchable Reduced Graphene Oxide‐Patterned Azobenzene‐Functionalized Liquid Crystalline Polymer Networks

In recent years, the “Kirigami” have been exploited to engineer stretchable electronics that exhibit enhanced deformability without sacrificing their mechanical and electrical properties. However, kirigami‐inspired engineering is often limited to passive mechanical stretching for 3D shape morphing....

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Bibliographic Details
Published in:Advanced functional materials 2021-08, Vol.31 (31), p.n/a
Main Authors: Cho, Woongbi, Jeon, Jisoo, Eom, Wonsik, Lee, Jae Gyeong, Kim, Dong‐Gyun, Kim, Yong Seok, Han, Tae Hee, Wie, Jeong Jae
Format: Article
Language:English
Subjects:
Azo compounds
Crystal structure
Crystallinity
Elastic deformation
Electrical properties
Formability
Graphene
Irradiation
Liquid crystal polymers
liquid crystalline polymer networks
Liquid crystals
Materials science
Modulus of elasticity
Morphing
nanocomposites
photomechanical actuations
Reconfiguration
reduced graphene oxides
Strain
stretchable electronics
Thickness
Ultraviolet radiation
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Summary:In recent years, the “Kirigami” have been exploited to engineer stretchable electronics that exhibit enhanced deformability without sacrificing their mechanical and electrical properties. However, kirigami‐inspired engineering is often limited to passive mechanical stretching for 3D shape morphing. To counter this problem, in this study, azobenzene‐functionalized liquid crystalline polymer networks (azo‐LCNs) are monolithically integrated with patterned reduced graphene oxide (rGO), called azo‐LCN/rGO, to achieve on‐demand shape reconfiguration in response to external stimuli (UV, NIR, solar rays, and portable light); in addition, the azo‐LCN/rGO exhibit highly enhanced mechanical and electrical properties. The cross‐sectional area and thickness of rGO patterns are controlled using a masking technique and evaporative self‐assembly. By the spatial patterning of rGO, insulating azo‐LCNs are converted into electrically conducting structures (381.9 S cm−1). The elastic modulus of
ISSN:1616-301X
1616-3028
DOI:10.1002/adfm.202102106