Light-printable epoxy oligomer wrinkle-forming surface for rewritable information storage

Xu, Lin; Azhar, Umair; Chen, Zizhao; Niu, Qing-Xia; Chen, Jian; Zhao, Xiaohan; Zhang, Shuxiang; Zong, Chuanyong

doi:10.1039/c9ra10569g

Cited by 5 publications

(7 citation statements)

References 43 publications

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“…22,27,60 It is worth noting that the time required to completely erase surface wrinkles on the main-chain azo-PI film/PDMS is slightly longer than that of the side-chain azopolymer-based film/PDMS bilayer wrinkle system with the same light power density (Table S1). 22,61 It is well-known that the trans and cis states of the azobenzene exist in different molecular lengths and dipole moments. 62 The reversible trans−cis isomerization rate and efficiency of the azobenzenes are influenced by the type of substituent group of azobenzene, the location of azobenzene units in the polymer chain, and the available free volume for the phototriggered localized polymerchain movement.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Flexible Azo-Polyimide-Based Smart Surface with Photoregulatable Surface Micropatterns: Toward Rewritable Information Storage and Wrinkle-Free Device Fabrication

Chen

et al. 2023

Langmuir

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Stimulus-sensitive materials are of great fascination in surface and interface science owing to their dynamically tunable surface properties and/or morphologies. Herein, we have synthesized an azobenzene-containing polyimide (azo-PI) with enhanced chain flexibility for the fabrication of photosensitive surface patterns on a film/substrate wrinkle system or wrinkle-free devices. The phototriggered cis–trans isomerization kinetics of azobenzene groups in the novel azo-PI with various chain structures were systematically investigated. On the basis of the characteristics of stress relaxation that azobenzene reversible cis–trans isomerization induces in the wrinkled azo-PI film/substrate system, a variety of rewritable visual surface patterns with high resolution and a long legibility time (>30 days) could be easily constructed via visible-light irradiation, enabling the wrinkled azo-PI surfaces to be used as rewritable information storage media. Meanwhile, because of the visible-light irradiation strategy, these photoresponsive surfaces could find potential application in the fabrication of wrinkle-free flexible devices. This study not only sheds light on the influence of the azo-polymer chain structure on its photoresponsive behavior but also provides a versatile strategy for realizing tailor-made smart surface patterns on multilayer functional devices.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Flexible Azo-Polyimide-Based Smart Surface with Photoregulatable Surface Micropatterns: Toward Rewritable Information Storage and Wrinkle-Free Device Fabrication

Chen

et al. 2023

Langmuir

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“…The variation in surface temperature of the azo‐film/PDMS bilayer after visible‐ light irradiation for 3 min was only about 4 °C, which was similar to previous reports. [ 58‐59 ] Specifically, the surface temperature of the sample was well below the glass transition temperature ( T g ) of the PDO 3 and PMMA during visible‐light irradiation. [ 40,60 ] It's worth noting that, the trans‐cis photoisomerization rate and efficiency of the azobenzene chromophores not only depend on the specific location of azobenzene units in polymer chain, but also are influenced by the available free volume for photo‐triggered configuration change of the azobenzene.…”

Section: Resultsmentioning

confidence: 99%

Light‐Responsive Polyblend Films with Reconfigurable Surface Micropatterns as Rewritable Information Storage Media

et al. 2022

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Comprehensive Summary Stimulus‐sensitive surfaces with tunable morphologies exhibit a wide range of applications in the fields of surface science and engineering. Herein, a cost‐effective yet practical strategy is proposed to fabricate photo‐sensitive patterning surface on film/substrate wrinkle system based on an azo‐containing polyblend. By manipulating the stress field of the bilayer system globally and/or locally upon the stress relaxation triggered by the reversible cis‐trans isomerization of the azobenzene, heating/cooling triggered surface wrinkles on the polyblend films could be tailor‐made with visible‐light‐irradiation. Notably, upon selective photo‐irradiation, bespoke surface patterns may be cyclically generated or eliminated, allowing these reconfigurable patterned polyblend surfaces to be used as rewritable information storage media for non‐ink printing. The as‐prepared photo‐printed information patterns with high‐resolution are shown to be rewritable for multiple cycles and legible for over 90 d in dark ambient conditions. This study not only provides a versatile strategy for flourishing the stimulus‐sensitive systems, but also sheds light on the stress relaxation‐triggered morphological evolution of the wrinkling polyblend films.

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“…120 Besides, from the past to the present, poled polymers have been used in more and more applications in the fields of optics, physics, chemistry, biology, medicine, and more. 121,122…”

Section: Othersmentioning

confidence: 99%

Poled polymers and their nonlinear optics

Wang

Zhan

et al. 2023

J. Mater. Chem. C

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Light-printable epoxy oligomer wrinkle-forming surface for rewritable information storage

Abstract: A novel rapidly responsive media for rewritable information storage comprised of an azobenzene-containing epoxy-based oligomer displaying surface wrinkling was developed.

Cited by 5 publications

References 43 publications

Flexible Azo-Polyimide-Based Smart Surface with Photoregulatable Surface Micropatterns: Toward Rewritable Information Storage and Wrinkle-Free Device Fabrication

Flexible Azo-Polyimide-Based Smart Surface with Photoregulatable Surface Micropatterns: Toward Rewritable Information Storage and Wrinkle-Free Device Fabrication

Light‐Responsive Polyblend Films with Reconfigurable Surface Micropatterns as Rewritable Information Storage Media

Poled polymers and their nonlinear optics

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