Obtaining a delamination‐free wrinkled functional graphene surface in layered systems is an interesting challenge because the interface is usually too weak to withstand interfacial stress mismatch, which can trigger mechanical instability. In this paper, a general strategy is proposed toward addressing the delamination limitation imposed by fabricating conformal graphene wrinkles with bilayer systems of poly(methyl methacrylate) (PMMA) and polydimethylsiloxane (PDMS). To improve the interfacial strength, a postcuring transfer process is introduced to form a gradient interface layer without interfacial liquid between the PMMA and PDMS by entanglement of polymer chains during high‐temperature curing. Compared to the conventional wet transfer of graphene,the transfer method can greatly enhance the interfacial strength. The chemical and mechanical mechanisms underlying the enhancement are revealed both experimentally and theoretically in terms of the transition from the buckled‐induced delamination state to the delamination‐free wrinkled state. Moreover, the light diffraction behaviors of multiscale graphene wrinkles are initially demonstrated to be an interesting continuous pattern induced by overlapping. The delamination‐free conformal wrinkled functional graphene surface can provide valuable insight and design guidelines for the fundamental problems of deformed graphene and its applications in flexible functional devices.

中文翻译：

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多尺度共形皱纹实现无分层功能性石墨烯表面

在分层系统中获得无分层的起皱功能性石墨烯表面是一个有趣的挑战，因为界面通常太弱而无法承受界面应力失配，从而可能引发机械不稳定。在本文中，提出了一种通用策略，以解决由聚甲基丙烯酸甲酯（PMMA）和聚二甲基硅氧烷（PDMS）的双层体系制造共形石墨烯皱纹所造成的分层限制。为了提高界面强度，引入了后固化转移工艺，以在高温固化过程中通过聚合物链的缠结在PMMA和PDMS之间形成没有界面液体的梯度界面层。与传统的石墨烯湿法转移相比，转移方法可以大大提高界面强度。从屈曲诱导的分层状态到无分层的起皱状态的转变，实验和理论上都揭示了增强作用的化学和机械机理。此外，最初证明多尺度石墨烯皱纹的光衍射行为是由重叠引起的有趣的连续图案。无分层共形褶皱功能性石墨烯表面可为变形石墨烯的基本问题及其在柔性功能器件中的应用提供有价值的见识和设计指南。最初证明多尺度石墨烯皱纹的光衍射行为是由重叠引起的有趣的连续图案。无分层共形褶皱功能石墨烯表面可以为变形石墨烯的基本问题及其在柔性功能器件中的应用提供有价值的见识和设计指南。最初证明多尺度石墨烯皱纹的光衍射行为是由重叠引起的有趣的连续图案。无分层共形褶皱功能石墨烯表面可以为变形石墨烯的基本问题及其在柔性功能器件中的应用提供有价值的见识和设计指南。