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首页> 外文期刊>Journal of Micromechanics and Microengineering >Localized modulus-controlled PDMS substrate for 2D and 3D stretchable electronics
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Localized modulus-controlled PDMS substrate for 2D and 3D stretchable electronics

机译：用于2D和3D可拉伸电子器件的局部模量控制的PDMS基板

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摘要

Stretchable electronics have great importance for applications of wearable devices and electronic skin. Balancing and improving mechanical stretchability and electronic performance are the key challenges that restrict further development of stretchable electronics. In order to achieve stretchable electronics, it is crucial to choose appropriate substrates, among which PDMS is the most commonly used polymer due to its easy fabrication and low cost. In this paper, we propose a novel strategy and fabricate localized modulus-controlled PDMS for both 2D and 3D stretchable electronics. Based on a secondary cross-link effect, the modulus of cured PDMS can be enhanced and controlled by spin-coating different masses of curing agent. Using a laser-cut PI mask, the modulus-enhanced region can be defined by users. Through this simple method, the functional conductive thin-film materials (gold/Ag nanowires/reduced graphene oxide) can be well protected when the structural layer is stretched and the 'barrel effect' of a multi-material film (where different material films possess different stretchability) on one piece of substrate can also be solved. Besides this, compared with uniform PDMS, different 3D buckling structures can be formed on locally modified PDMS as a substrate by a pre-stretching and releasing process, illustrating a new way to control the 3D buckling structure.
机译：可伸展的电子设备对于可穿戴设备和电子皮肤的应用非常重要。平衡和提高机械拉伸性和电子性能是限制可拉伸电子产品的进一步发展的关键挑战。为了实现可拉伸的电子器件，选择合适的基材至关重要，其中PDMS是由于其易于制造和低成本，因此PDMS是最常用的聚合物。在本文中，我们提出了一种新的策略和制造局部模量控制的PDMS，适用于2D和3D可拉伸电子器件。基于二次交联效应，通过旋涂不同的固化剂，可以增强和控制固化的PDMS模量。使用激光切割PI掩模，模量增强区域可以由用户定义。通过这种简单的方法，当结构层被拉伸并且多材料膜的“镜筒效应”（不同的材料膜具有时，功能导电薄膜材料（金/ Ag纳米线/氧化物氧化物）可以很好地保护。也可以解决一片基板上的不同拉伸性。除此之外，与均匀的PDMS相比，通过预拉伸和释放工艺，可以在局部修改的PDMS上形成不同的3D屈曲结构，示出了控制3D屈曲结构的新方法。

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