State Key Laboratory of Advanced Welding and Joining, School of Materials Science and Engineering, Harbin Institute of Technology at Shenzhen, Shenzhen, 518055, P. R. China.
Center of Flexible and Printable Electronics, Harbin Institute of Technology at Shenzhen, Shenzhen, 518055, P. R. China.
Sci Rep. 2019 Feb 20;9(1):2403. doi: 10.1038/s41598-019-38931-x.
Sensitivity and transparency are critical properties for flexible and wearable electronic devices, and how to engineer both these properties simultaneously is dramatically essential. Here, for the first time, we report the assembly of ordered array structures of silver nanowires (AgNWs) via a simple water-bath pulling method to align the AgNWs embedded on polydimethylsiloxane (PDMS). Compared with sensors prepared by direct drop-casting or transfer-printing methods, our developed sensor represents a considerable breakthrough in both sensitivity and transparency. The maximum transmittance was 86.3% at a wavelength of 550 nm, and the maximum gauge factor was as high as 84.6 at a strain of 30%. This remarkably sensitive and transparent flexible sensor has strictly stable and reliable responses to motion capture and human body signals; it is also expected to be able to help monitor disabled physical conditions or assist medical therapy while ensuring privacy protection.
灵敏度和透明度是柔性可穿戴电子设备的关键特性，如何同时设计这两个特性至关重要。在这里，我们首次报告了通过简单的水浴提拉法组装银纳米线（AgNWs）的有序阵列结构，以将嵌入在聚二甲基硅氧烷（PDMS）上的 AgNWs 对齐。与通过直接滴铸或转印方法制备的传感器相比，我们开发的传感器在灵敏度和透明度方面都有了相当大的突破。在 550nm 波长处的最大透过率为 86.3%，在 30%应变时的最大应变系数高达 84.6。这种具有显著灵敏度和透明度的柔性传感器对运动捕捉和人体信号具有严格稳定和可靠的响应；它还有望在确保隐私保护的同时，帮助监测残疾人士的身体状况或协助医疗。
