Zhang Meng, Han Songjia, Xuan Zhi-Yang, Fang Xiaohui, Liu Xiaoming, Zhang Wu, Chen Hui-Jiuan
Precision Medicine Institute, The First Affiliated Hospital of Sun Yat-Sen University, Sun Yat-Sen University, Guangzhou 510080, China.
State Key Laboratory of Optoelectronic Materials and Technologies, School of Electronics and Information Technology, Sun Yat-Sen University, Guangzhou 510006, China.
Micromachines (Basel). 2021 May 27;12(6):618. doi: 10.3390/mi12060618.
Silver nanowire (AgNW)-coated thin films are widely proposed for soft electronics application due to their good conductivity, transparency and flexibility. Here, we studied the microwave welding of AgNW-based soft electrodes for conductivity enhancement. The thermal effect of the microwave to AgNWs was analyzed by dispersing the nanowires in a nonpolar solution, the temperature of which was found to be proportional with the nanowire diameters. AgNWs were then coated on a thin film and welded under microwave heating, which achieved a film conductivity enhancement of as much as 79%. A microwave overheating of AgNWs, however, fused and broke the nanowires, which increased the film resistance significantly. A soft electrode was finally demonstrated using the microwave-welded AgNW thin film, and a 1.13 µA/mM sensitivity was obtained for glucose sensing. Above all, we analyzed the microwave thermal effect on AgNWs to provide a guidance to control the nanowire welding effect, which can be used for film conductivity enhancement and applied for soft and bio-compatible electrodes.
由于具有良好的导电性、透明度和柔韧性，银纳米线（AgNW）涂层薄膜被广泛应用于柔性电子领域。在此，我们研究了基于AgNW的软电极的微波焊接以提高导电性。通过将纳米线分散在非极性溶液中来分析微波对AgNW的热效应，发现该溶液的温度与纳米线直径成正比。然后将AgNW涂覆在薄膜上并在微波加热下进行焊接，薄膜的导电性提高了79%。然而，AgNW的微波过热会使纳米线熔断和断裂，从而显著增加薄膜电阻。最终展示了一种使用微波焊接的AgNW薄膜制成的软电极，在葡萄糖传感中获得了1.13 μA/mM的灵敏度。最重要的是，我们分析了微波对AgNW的热效应，为控制纳米线焊接效果提供指导，这可用于提高薄膜导电性，并应用于柔软且生物相容性好的电极。
