表面等离子共振
石墨烯
材料科学
长周期光纤光栅
光电子学
灵敏度(控制系统)
光纤传感器
光学
纤维
纳米技术
纳米颗粒
电子工程
渐变折射率纤维
复合材料
物理
工程类
作者
Wei Wei,Jinpeng Nong,Guiwen Zhang,Linlong Tang,Xiao Jiang,Na Chen,Luo Su-qin,Guilian Lan,Yudan Zhu
出处
期刊:Sensors
[MDPI AG]
日期:2016-12-22
卷期号:17 (12): 2-2
被引量:61
摘要
A graphene-based long-period fiber grating (LPFG) surface plasmon resonance (SPR) sensor is proposed. A monolayer of graphene is coated onto the Ag film surface of the LPFG SPR sensor, which increases the intensity of the evanescent field on the surface of the fiber and thereby enhances the interaction between the SPR wave and molecules. Such features significantly improve the sensitivity of the sensor. The experimental results demonstrate that the sensitivity of the graphene-based LPFG SPR sensor can reach 0.344 nm%-1 for methane, which is improved 2.96 and 1.31 times with respect to the traditional LPFG sensor and Ag-coated LPFG SPR sensor, respectively. Meanwhile, the graphene-based LPFG SPR sensor exhibits excellent response characteristics and repeatability. Such a SPR sensing scheme offers a promising platform to achieve high sensitivity for gas-sensing applications.
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