激光与光电子学进展, 2019, 56 (23): 230601, 网络出版: 2019-11-27   

氧化石墨烯增强型表面等离子体共振光纤传感器 下载: 1387次

Graphene-Oxide-Enhanced Surface Plasmon Resonance Fiber Sensor
赵静 1,**王英 2王义平 2,*
作者单位
1 深圳信息职业技术学院, 广东 深圳 518172
2 深圳大学光电工程学院, 广东 深圳 518061
摘要
提出了一种基于侧边抛磨光纤的氧化石墨烯增强型表面等离子体共振光纤传感器。以银膜为激发表面等离子体波的金属层,采用正十八硫醇作为桥连层,在银基光纤传感器表面修饰了寡层氧化石墨烯纳米膜。表层复合膜为银膜提供了钝化保护,传感器稳定性增强。在1.32~1.34 RIU(RIU为单位折射率)的检测区域中,其平均灵敏度达到2252.5 nm/RIU,相比于氧化石墨烯修饰前的同结构、同参数的光纤传感器,其折射率灵敏度提高了1.48倍,且器件优化指标没有因为膜层增加而大幅降低。该传感器生物分子组装效率高,可进一步应用于抗体、抗原免疫检测等领域。
Abstract
This paper proposes a graphene-oxide-enhanced surface plasmon resonance (SPR) sensor based on side-polished fiber. A silver film is deposited to excite the surface plasmon wave. Seldom graphene oxide nano-films are then decorated on the silver surface of the sensor, where self-assembly octadecanethiol films serve as a link between graphene oxide and silver. The decorated composite films protect the silver film from degradation and enhance the sensor's stability. Compared with the same SPR sensor without graphene-oxide decoration, the average sensitivity of the proposed SPR sensor is 2252.5 nm/RIU in the test range of 1.32-1.34 RIU (RIU is refractive index unit), which is enhanced by 1.48 times, and the figure of merit is comparable with the former without any significant decrease due to the increase of film layers. The proposed fiber sensor is a promising candidate in applications such as antibody antigen immunoassays with high immobilization ability.

赵静, 王英, 王义平. 氧化石墨烯增强型表面等离子体共振光纤传感器[J]. 激光与光电子学进展, 2019, 56(23): 230601. Jing Zhao, Ying Wang, Yiping Wang. Graphene-Oxide-Enhanced Surface Plasmon Resonance Fiber Sensor[J]. Laser & Optoelectronics Progress, 2019, 56(23): 230601.

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