Near-infrared light-responsive dynamic wrinkle patterns

作者：Li, Fudong; Hou, Honghao; Yin, Jie; Jiang, Xuesong^*

来源：Science Advances, 2018, 4(4): eaar5762.

DOI：10.1126/sciadv.aar5762

• CRYSTALLINE ELASTOMER NANOCOMPOSITES
• THIN POLYMER-FILMS
• SURFACE WRINKLES
• STRUCTURAL COLOR
• SOFT MATTER
• MICROWRINKLES
• TRANSPARENCY
• ACTUATION
• FRICTION
• ADHESION

Dynamic micro/nanopatterns provide an effective approach for on-demand tuning of surface properties to realize a smart surface. We report a simple yet versatile strategy for the fabrication of near-infrared (NIR) light-responsive dynamic wrinkles by using a carbon nanotube (CNT)-containing poly(dimethylsiloxane) (PDMS) elastomer as the substrate for the bilayer systems, with various functional polymers serving as the top stiff layers. The high photon-to-thermal energy conversion of CNT leads to the NIR-controlled thermal expansion of the elastic CNT-PDMS substrate, resulting in dynamic regulation of the applied strain (epsilon) of the bilayer system by the NIR on/off cycle to obtain a reversible wrinkle pattern. The switchable surface topological structures can transfer between the wrinkled state and the wrinkle-free state within tens of seconds via NIR irradiation. As a proof-of-concept application, this type of NIR-driven dynamic wrinkle pattern was used in smart displays, dynamic gratings, and light control electronics.

• 出版日期2018-4
• 单位上海交通大学