Abstract A simple method for fabricating a liquid metal (LM) pattern on a polydimethylsiloxane substrate through the process of contact printing is introduced in this paper. This material is easily oxidized when it is exposed to air; consequently, it is difficult to manipulate. Contact printing is a fabrication process based on an adhesive force between interfaces. Adhesion is enhanced by forming a new oxide layer; thus, the LM film on a flat mold is transferred to another mold by contact printing. Electrical conductivity of the transferred LM is 1.93 × 106 S/m, which is sufficiently high for its usage as an electrode in electric circuits. The resolution of the LM pattern can be controlled at ~20 μm and a complex pattern can be fabricated. Furthermore, the LM is semi-transparent and it is visually imperceptible when observed from a distance. Using the semi-transparent LM electrode, a LM triboelectric nanogenerator is fabricated. The device demonstrates normal performance as an energy harvesting system; consequently, the LM patterned by contact printing can be applied to wearable self-powered electronics.

中文翻译：

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接触印刷法制备基于镓合金的摩擦纳米发电机用液态金属电极

摘要 本文介绍了一种通过接触印刷工艺在聚二甲基硅氧烷基板上制备液态金属（LM）图案的简单方法。这种材料暴露在空气中很容易被氧化；因此，很难操纵。接触印刷是一种基于界面之间粘附力的制造工艺。通过形成新的氧化层增强附着力；因此，平面模具上的LM薄膜通过接触印刷转移到另一个模具上。转移的 LM 的电导率为 1.93 × 106 S/m，足以用作电路中的电极。LM 图案的分辨率可以控制在~20 μm，并且可以制造复杂的图案。此外，LM 是半透明的，从远处观察时肉眼无法察觉。使用半透明的LM电极，制造了LM摩擦纳米发电机。该设备表现出作为能量收集系统的正常性能；因此，通过接触印刷图案化的 LM 可以应用于可穿戴自供电电子产品。