Yu Yunru, Guo Jiahui, Zhang Han, Wang Xiaocheng, Yang Chaoyu, Zhao Yuanjin
Department of Clinical Laboratory, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China.
Oujiang Laboratory, Zhejiang Lab for Regenerative Medicine, Vision, and Brain Health, Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325000, China.
Innovation (Camb). 2022 Jan 19;3(2):100209. doi: 10.1016/j.xinn.2022.100209. eCollection 2022 Mar 29.
The advancements in flexible electronics call for invention of fiber-based electronic systems by surface modification or encapsulation. Here we present novel shear-flow-induced graphene nanosheets coating microfibers by integrating the dip coating approach with the microfluidic spinning method. The core hydrogel microfiber was first spun continuously from the microfluidic device, and the shear flow from the dip coating approach allowed formation of the thin graphene oxide (GO) nanosheet coating shell. Because the fluid components and flow rates in the microfluidic spinning together with the lifting speed in the dip coating approach are highly controllable, the morphology of the resultant microfibers could be precisely tailored, including the core-shell structure, conductivity, and thermal responsibilities. These features equipped the resultant microfibers with the potential of thermal and motion sensors, and their value in gesture indicators has also been explored. Microfibers generated from such a simple and controllable method could be versatile in flexible electronics.
柔性电子学的进步要求通过表面改性或封装来发明基于纤维的电子系统。在此，我们通过将浸涂方法与微流控纺丝方法相结合，展示了一种新型的剪切流诱导石墨烯纳米片包覆微纤维。首先从微流控装置中连续纺出核心水凝胶微纤维，浸涂方法产生的剪切流使得形成氧化石墨烯（GO）纳米片薄包覆壳层。由于微流控纺丝中的流体成分和流速以及浸涂方法中的提拉速度具有高度可控性，因此可以精确调整所得微纤维的形态，包括核壳结构、导电性和热响应性。这些特性使所得微纤维具有作为热传感器和运动传感器的潜力，并且还探索了它们在手势指示器方面的价值。通过这种简单且可控的方法制备的微纤维在柔性电子学中具有广泛的用途。
