Lee Minwoo, Kim Jaeseong, Khine Myat Thet, Kim Sunkook, Gandla Srinivas
Multifunctional Nano Bio Electronics Lab, Department of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea.
Nanomaterials (Basel). 2023 Aug 31;13(17):2467. doi: 10.3390/nano13172467.
Disposable wearable sensors that ultrathin and conformable to the skin are of significant interest as affordable and easy-to-use devices for short-term recording. This study presents a facile and low-cost method for transferring spray-coated silver nanowire (AgNW) composite films onto human skin using glossy paper (GP) and liquid bandages (LB). Due to the moderately hydrophobic and rough surface of the GP, the ultrathin AgNWs composite film (200 nm) was easily transferred onto human skin. The AgNW composite films conformally attached to the skin when applied with a LB, resulting in the stable and continuous recording of wearable electrophysiological signals, including electromyogram (EMG), electrocardiogram (ECG), and electrooculogram (EOG). The volatile LB, deposited on the skin via spray coating, promoted rapid adhesion of the transferred AgNW composite films, ensuring stability to the AgNWs in external environments. The AgNWs composite supported with the LB film exhibited high water vapor breathability (28 gmh), which can avoid the accumulation of sweat at the skin-sensor interface. This approach facilitates the creation of rapid, low-cost, and disposable tattoo-like sensors that are practical for extended use.
超薄且贴合皮肤的一次性可穿戴传感器作为用于短期记录的经济实惠且易于使用的设备，备受关注。本研究提出了一种简便且低成本的方法，即使用光面纸（GP）和液体绷带（LB）将喷涂的银纳米线（AgNW）复合膜转移到人体皮肤上。由于GP具有适度的疏水性和粗糙表面，超薄的AgNW复合膜（约200纳米）很容易转移到人体皮肤上。当使用LB时，AgNW复合膜能与皮肤紧密贴合，从而实现对包括肌电图（EMG）、心电图（ECG）和眼电图（EOG）在内的可穿戴电生理信号的稳定连续记录。通过喷涂沉积在皮肤上的挥发性LB促进了转移的AgNW复合膜的快速粘附，确保了AgNW在外部环境中的稳定性。由LB膜支撑的AgNW复合材料表现出高水蒸气透气性（约28克/平方米·小时），这可以避免皮肤与传感器界面处汗水的积聚。这种方法有助于制造出快速、低成本且一次性的纹身式传感器，适用于长期使用。
