Key Laboratory of Eco-Textile, Ministry of Education, School of Textiles and Clothing, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
Cambridge Graphene Centre, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, UK.
Nanoscale. 2019 May 28;11(20):9912-9919. doi: 10.1039/c9nr00463g. Epub 2019 May 8.
Two-dimensional (2D) materials are a rapidly growing area of interest for wearable electronics, due to their flexible and unique electrical properties. All-textile-based wearable electronic components are key to enable future wearable electronics. Single component electrical elements have been demonstrated; however heterostructure-based assemblies, combining electrically conductive and dielectric textiles such as all-textile capacitors are currently missing. Here we demonstrate a superhydrophobic conducting fabric with a sheet resistance R∼ 2.16 kΩ□, and a pinhole-free dielectric fabric with a relative permittivity ε∼ 2.35 enabled by graphene and hexagonal boron nitride inks, respectively. The different fabrics are then integrated to engineer the first example of an all-textile-based capacitive heterostructure with an effective capacitance C ∼ 26 pF cm and a flexibility of ∼1 cm bending radius. The capacitor sustains 20 cycles of repeated washing and more than 100 cycles of repeated bending. Finally, an AC low-pass filter with a cut-off frequency of ∼15 kHz is integrated by combining the conductive polyester and the capacitor. These results pave the way toward all-textile vertically integrated electronic devices.
二维（2D）材料因其灵活和独特的电学性能，成为可穿戴电子领域的研究热点。基于全纺织的可穿戴电子元件是实现未来可穿戴电子技术的关键。已经有研究证明了单一组件电子元件的可行性；然而，目前还缺乏基于异质结构的组件，例如将导电和介电纺织品（如全纺织电容器）结合在一起的异质结构组件。在这里，我们展示了一种具有超疏水性的导电织物，其方阻 R∼ 2.16 kΩ□，以及一种由石墨烯和六方氮化硼墨水分别实现的具有相对介电常数 ε∼ 2.35 的无针孔介电织物。然后，将不同的织物集成在一起，构建了第一个基于全纺织的电容异质结构的实例，其有效电容 C ∼ 26 pF cm，弯曲半径可灵活至 1 cm。该电容器能够承受 20 次重复洗涤和 100 多次重复弯曲的循环。最后，通过将导电聚酯和电容器相结合，集成了一个具有约 15 kHz 截止频率的交流低通滤波器。这些结果为全纺织垂直集成电子器件铺平了道路。
