Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, PR China; Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, PR China.
Flexible Electronics Innovation Institute (FEII), Jiangxi Science & Technology Normal University, Nanchang 330013, PR China.
J Hazard Mater. 2021 Jun 5;411:125008. doi: 10.1016/j.jhazmat.2020.125008. Epub 2021 Jan 4.
Rational design of fiber-shaped gas sensors with both excellent mechanical properties and sensing performance is of great significance for boosting future portable and wearable sensing electronics, however, it is still a challenge. Herein, we develop a novel fiber-shaped hydrogen (H) sensor by directly electrochemically growing palladium (Pd) sensing layer on conductive poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) fiber electrode. This approach produces free-standing functional fiber (PEDOT:PSS@Pd) with promising mechanical features of flexibility, light weight, knittability and high mechanical strength, and good H sensing performance at room temperature. The PEDOT:PSS@Pd fiber sensor exhibits short response time of 34 (± 6) s@1% and 19 (± 4) s@4% H and excellent cycling stability. In addition, the fiber sensor remains good sensing behavior under different mechanical bending states, showing potential for constructing wearable sensor devices for timely H leak detection. Therefore, this work has provided a smart design strategy of fiber-based gas sensor, offering an effective sensing platform and is believed to stimulate the development of wearable electronics.
理性设计兼具优异机械性能和传感性能的纤维状气体传感器，对于推动未来的便携式和可穿戴传感电子学具有重要意义，但这仍然是一个挑战。在此，我们通过在导电聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）纤维电极上直接电化学生长钯（Pd）传感层，开发了一种新型纤维状氢（H）传感器。该方法产生了具有良好机械性能的独立功能纤维（PEDOT：PSS@Pd），具有柔韧性、重量轻、可编织性和高强度的特点，并且在室温下具有良好的 H 传感性能。PEDOT：PSS@Pd 纤维传感器在 1% H 和 4% H 下表现出 34（±6）s@1%和 19（±4）s@4%的短响应时间和出色的循环稳定性。此外，纤维传感器在不同的机械弯曲状态下仍保持良好的传感行为，为构建用于及时检测 H 泄漏的可穿戴传感器设备提供了潜力。因此，这项工作为基于纤维的气体传感器提供了一种智能设计策略，提供了一个有效的传感平台，有望刺激可穿戴电子学的发展。
