Spontaneous wrinkled surfaces in nature usually possess unique physical and chemical properties. Inspired by nature and stimulated by practical application, artificial wrinkle patterns have received increasing interest recently. Here, the controllable heterogeneous wrinkles in metal films deposited on polydimethylsiloxane substrates by combination of mechanical loading and heat treatment is reported. It is found that the wrinkles are spontaneously localized at small strain condition due to the uneven distribution of wrinkle amplitudes on the film surface. The morphological features and underlying mechanisms of such wrinkles are investigated based on the strain theory. The friction property is found to be well controlled by the aspect ratio and orientation of the wrinkle patterns. Complex 2D wrinkle array is also achieved by applying heat treatment and mechanical compression in sequence. This study may broaden the knowledge of spontaneous heterogeneous wrinkles in film‐substrate system and provide a novel way to tailor various wrinkle patterns via independently tuning annealing temperature and mechanical strain.

中文翻译：

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通过机械负载和热处理相结合的方法来利用金属/聚二甲基硅氧烷薄膜系统中的异质皱纹

自然界中的自发皱纹表面通常具有独特的物理和化学性质。受自然界的启发和实际应用的刺激，人造皱纹模式近来受到越来越多的关注。在此，报道了通过机械负载和热处理相结合而沉积在聚二甲基硅氧烷基底上的金属膜中可控的异质皱纹。发现由于在膜表面上的皱纹幅度的不均匀分布，皱纹在小应变条件下自发地定位。基于应变理论研究了此类皱纹的形态特征和潜在机理。发现通过长宽比和皱纹图案的取向很好地控制了摩擦性能。复杂的2D皱纹阵列也可以通过依次进行热处理和机械压缩来实现。这项研究可以拓宽薄膜-基材系统中自发异质皱纹的知识，并提供一种通过独立调节退火温度和机械应变来定制各种皱纹图案的新颖方法。