The development of advanced flexible large-area electronics such as flexible displays and sensors will thrive on engineered functional ink formulations for printed electronics where the spontaneous arrangement of molecules aids the printing processes. Here we report a printable elastic conductor with a high initial conductivity of 738 S cm−1 and a record high conductivity of 182 S cm−1 when stretched to 215% strain. The elastic conductor ink is comprised of Ag flakes, a fluorine rubber and a fluorine surfactant. The fluorine surfactant constitutes a key component which directs the formation of surface-localized conductive networks in the printed elastic conductor, leading to a high conductivity and stretchability. We demonstrate the feasibility of our inks by fabricating a stretchable organic transistor active matrix on a rubbery stretchability-gradient substrate with unimpaired functionality when stretched to 110%, and a wearable electromyogram sensor printed onto a textile garment.
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机译：诸如柔性显示器和传感器之类的先进柔性大面积电子设备的开发将在印刷电子设备的工程功能墨水配方上蓬勃发展，其中分子的自发排列有助于印刷过程。在这里，我们报道了一种可印刷的弹性导体，当其拉伸至215％应变时，其初始电导率为738 S cm -1 ，而创纪录的电导率为182 S cm -1 。弹性导体油墨由Ag薄片，氟橡胶和氟表面活性剂组成。氟表面活性剂构成关键组分，该组分指导印刷弹性导体中表面局部导电网络的形成，从而导致高导电性和可拉伸性。我们通过在橡胶状可拉伸梯度基质上制备可拉伸的有机晶体管活性基质，并在拉伸至110％时功能不受损害，并在纺织品服装上印刷可穿戴的肌电图传感器，证明了我们油墨的可行性。
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