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 (ε) 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.

中文翻译：

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近红外光响应动态皱纹图案。


动态微/纳米图案为按需调整表面特性以实现智能表面提供了有效的方法。我们报告了一种简单而通用的策略，通过使用含有碳纳米管（CNT）的聚（二甲基硅氧烷）（PDMS）弹性体作为双层系统的基材来制造近红外（NIR）光响应动态皱纹，具有各种功能性聚合物用作顶部刚性层。 CNT 的高光子热能转换导致弹性 CNT-PDMS 基底的 NIR 控制热膨胀，从而通过 NIR 开/关循环动态调节双层系统的施加应变 (ε)，从而实现获得可逆的皱纹图案。可切换的表面拓扑结构可以通过近红外辐射在数十秒内在起皱状态和无起皱状态之间转换。作为概念验证应用，这种近红外驱动的动态皱纹图案被用于智能显示器、动态光栅和光控制电子设备。