Light-Written Reversible 3D Fluorescence and Topography Dual-Pattern with Memory and Self-Healing Abilities

Abstract

<jats:p>To achieve the dynamical dual-pattern with multiplex information of complex topography and 3D fluorescence is challenging yet promising for wide applications ranging from visual bioassays, memory, smart devices to smart display. Here, we develop a convenient, reliable, and versatile method to realize the well-ordered dual-pattern with reversible topography and 3D fluorescence via a light direct-writing approach based on the wrinkle mechanism. By introducing the charge transfer (CT) interaction between <jats:italic>π</jats:italic>-electron-rich anthracene (AN) and <jats:italic>π</jats:italic>-electron-poor naphthalene diimide (NDI) into the polymer system, both modulus and fluorescence of the polymer films can be spatially regulated through the photodimerization of AN, which is controlled <jats:italic>in-plane</jats:italic> by photomasks, and becomes gradient in the <jats:italic>vertical</jats:italic> direction due to the filter effect of light. Therefore, the exposed sample displays a well-ordered complex pattern with the same topography as the applied photomask and 3D gradient change of fluorescence from red to green laterally across the layers simultaneously. The spatial cross-linking and CT interaction of the gradient layer can be controlled independently, which not only provides the reliability and reversibility of the topographical and fluorescence dual-pattern but also endows the possibility for tailoring the pattern with memory and self-healing. These characters of the dual-pattern with reversible topography and 3D fluorescence declare the clear applications in smart multiplex displays, memory, anticounterfeiting, visual detections, and so on.</jats:p>

An Aligned Patterned Biomimetic Elastic Membrane Has a Potential as Vascular Tissue Engineering Material

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A stimuli-responsive pillar[5]arene-based hybrid material with enhanced tunable multicolor luminescence and ion-sensing ability

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Dynamic Surface Wrinkles for In Situ Light-Driven Dynamic Gratings

“…The liquid crystal thermodynamic properties also limit the arrangement of periodic structures and consequently the diversity of the diffraction pattern. ,,, Generally, they cannot be designed top-down. In addition, the variation of dynamic diffraction patterns such as the width or field of view is not sufficient. ,,, Besides liquid crystals, − surface micro/nanoscale wrinkles, which are often found in bilayer systems, − provide an alternative for diffraction gratings. ,,− With photomasks, various wrinkled patterns can be designed, and they exhibit diverse diffraction patterns. , Furthermore, dynamic wrinkles are obtained by regulating the modulus of the film or the strain in the bilayer system according to linear buckling theory. − Although there are few systematic studies and challenges for dynamic wrinkle-based gratings, these dynamic wrinkles may still find potential application in DDGs. Besides, state-of-the-art wrinkles are all single-sided, which is difficult for realizing complex two-dimensional (2D) diffraction patterns.…”