Near-infrared light–responsive dynamic wrinkle patterns

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Presentation transcript:

Near-infrared light–responsive dynamic wrinkle patterns by Fudong Li, Honghao Hou, Jie Yin, and Xuesong Jiang Science Volume 4(4):eaar5762 April 6, 2018 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

Fig. 1 Schematic illustration of NIR-driven dynamic wrinkle pattern fabrication. Schematic illustration of NIR-driven dynamic wrinkle pattern fabrication. (A) Fabrication process of NIR-driven dynamic wrinkles. RT, room temperature. (B) Temperature variation of CNT-PDMS in NIR on/off switch. (C) Atomic force microscopy (AFM) images to test reversibility of the NIR-driven wrinkles. NIR intensity is approximately 1.5 W/cm2. Fudong Li et al. Sci Adv 2018;4:eaar5762 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

Fig. 2 Dynamics of wrinkle extinction/formation process via NIR switchable on/off cycle. Dynamics of wrinkle extinction/formation process via NIR switchable on/off cycle. (A to C) Optical images of wrinkle disappearance behavior via NIR irradiation. (D to F) Optical images of the wrinkle formation process after cessation of NIR irradiation. (G) Deformation of CNT-PDMS and the corresponding amplitude variation of wrinkles as a function of NIR irradiation time. (H) Extinction/formation cycles. The skin layer is PSF with the thickness of ~122 nm, and the CNT content in the PDMS substrate is 0.05%. NIR light intensity is approximately 1.5 W/cm2. Scale bar, 100 μm. Fudong Li et al. Sci Adv 2018;4:eaar5762 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

Fig. 3 NIR-driven controlled wrinkle pattern and its real-time dynamics. NIR-driven controlled wrinkle pattern and its real-time dynamics. (A) Schematic illustration of controlled wrinkle formation. The inset at the bottom is the reversible chemical reaction in the skin layer via UV light irradiation with different wavelengths. (B to D) Optical images of stripe wrinkled pattern’s disappearing behavior via NIR radiation. (E to G) Optical images of recovery evolution process after NIR being removed. (H) Optical image of hierarchical wrinkle pattern (G) erased by irradiation of 254-nm UV light for 5 min. Scale bar, 100 μm. (I and J) Optical images of the extinction/formation process of circular ring pattern. The NIR intensity is 1.5 W/cm2. The CNT content in PDMS is 0.05%. Scale bar, 621 μm. Fudong Li et al. Sci Adv 2018;4:eaar5762 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

Fig. 4 Illustration of the NIR-responsive wrinkle pattern serving as a dynamic light grating. Illustration of the NIR-responsive wrinkle pattern serving as a dynamic light grating. (A) Schematic demonstration of the NIR-controlled dynamic light grating. (B) Evolution process of light diffraction patterns upon the NIR on/off switch. NIR light intensity is 1.5 W/cm2. Fudong Li et al. Sci Adv 2018;4:eaar5762 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

Fig. 5 Schematic representation of the NIR-driven smart windows, information record, and electronic devices. Schematic representation of the NIR-driven smart windows, information record, and electronic devices. (A) Images of switchable transparency due to the reversibility of the wrinkled/wrinkle-free surface. The Shanghai Jiao Tong University logo is underlying the sample. The insets are AFM images. Scar bars, 100 μm. (B) Demonstration of dynamic information record through controlled wrinkle formation via different photomasks. (C) Schematic showing of NIR-driven electronics. (D) Optical images of the extinction/formation cycle of a gold-PAN/CNT-PDMS sample. Scale bar, 100 μm. (E) Electrical resistance as a function of NIR radiation time. NIR light intensity is approximately 1.5 W/cm2. Fudong Li et al. Sci Adv 2018;4:eaar5762 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).