石墨烯 - 矿纤维光探测器
S Akhavan1, A Taheri Najafabadi1, S Mignuzzi1
1Cambridge Graphene Centre, University of Cambridge, JJ Thompson Avenue, Cambridge, CB3 0FA, UK.
Advanced materials (Deerfield Beach, Fla.)
|June 2, 2024
概括
研究人员开发了使用石墨烯和矿用于可穿戴电子产品的新型纤维光探测器 (PD). 这些灵活的PD表现出高性能和耐用性,适合生理监测和智能织品.
科学领域:
- 材料科学 材料科学 材料科学
- 光电学是指光电子产品.
- 可穿戴技术可穿戴技术
背景情况:
- 像光探测器 (PD) 这样的光电子设备对于可穿戴医疗保健和生理监测至关重要.
- 现有的可穿戴系统需要的材料是灵活的,符合身体运动,并机械坚固.
- 将这些设备集成到织品中需要先进的材料解决方案.
研究的目的:
- 开发高灵敏度和快速响应的基于纤维的光电探测器 (PDs) 以集成到可穿戴和织应用中.
- 创建灵活的光电子设备,能够在机械应力和冲洗下保持性能.
- 推进可穿戴传感器领域的持续生理监测.
主要方法:
- 导电纤维的制造方法是将单层石墨烯 (SLG) 滚动在纤维周围.
- 介电层 (Al2O3,parylene C) 和第二层制的SLG层的沉积形成了晶体管通道.
- 整合矿作为光活性材料来创建光纤光探测器.
- 设备性能的表征,包括响应时间,响应能力和机械/可洗性测试.
主要成果:
- 实现了网关可调光纤PD,响应时间快约9毫秒.
- 在488nm处表现出高的~22 kA/W的外部响应,具有1V偏差.
- 在曲下保持高达80%的光电流,直至半径为4mm.
- 在30个洗周期后保留了 ~72%的初始光电流,表明了显著的耐用性.
结论:
- 与现有的可穿戴纤维PD相比,开发的石墨烯矿纤维PD提供了更高的性能.
- 这些设备显示出出色的机械灵活性和可洗性,这使得它们对实际的可穿戴应用非常有希望.
- 这项工作为智能织品和医疗监测中的先进,集成的光电子传感器铺平了道路.
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