Waterproof bioelectrodes enable long-term biological monitoring and the assessment of performances of athletes in water. Existing gel electrodes change their electrical properties even when covered with a waterproof film. Here, the authors present the poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) (PEDOT:PSS)/poly(styrene-butadiene-styrene) (SBS) bi-layer nanosheet and waterproof film for a comfortable waterproof bioelectrode. PEDOT:PSS/SBS is fully foldable with a conductivity loss of only 5%. This foldable nanosheet electrode provides a reliable electrical connection between the skin and the wire. The waterproof film-covered bioelectrode enables continuous monitoring of electrocardiograms in water, showing a signal-to-noise ratio of 21.5 dB for the R wave and 17.5 dB for the T wave, comparable to atmospheric measurements, and sensing a change in heart rate from 79 to 131 bpm during bathing.

中文翻译：

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使用聚氨酯薄膜防水的聚（3,4-乙烯二氧噻吩）：聚（苯乙烯磺酸盐）纳米片在水中测量心电图

防水生物电极可实现长期生物监测和运动员在水中的表现评估。即使覆盖有防水膜，现有的凝胶电极也会改变其电气特性。在这里，作者介绍了聚（3,4-乙烯二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）/聚（苯乙烯-丁二烯-苯乙烯）（SBS）双层纳米片和防水膜，用于舒适的防水生物电极. PEDOT:PSS/SBS 是完全可折叠的，电导率损失仅为 5%。这种可折叠的纳米片电极在皮肤和电线之间提供了可靠的电连接。防水膜覆盖的生物电极可以连续监测水中的心电图，显示 R 波的信噪比为 21.5 dB，T 波的信噪比为 17.5 dB，可与大气测量相媲美，