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	Graphene/Au-Enhanced Plastic Clad Silica Fiber Optic Surface Plasmon Resonance Sensor
	Wei, Wei1,3; Nong, Jinpeng1,3; Zhu, Yong1; Zhang, Guiwen1; Wang, Ning1; Luo, Suqin2; Chen, Na1; Lan, Guilian1; Chuang, Chin-Jung3,4; Huang, Yu3
	2018-04-01
摘要	Owing to its large surface-to-volume ratio and good biocompatibility, graphene has been identified as a highly promising candidate as the sensing layer for fiber optic sensors. In this paper, a graphene/Au-enhanced plastic clad silica (PCS) fiber optic surface plasmon resonance (SPR) sensor is presented. A sheet of graphene is employed as a sensing layer coated around the Au film on the PCS fiber surface. The PCS fiber is chosen to overcome the shortcomings of the structured microfibers and construct a more stable and reliable device. It is demonstrated that the introduction of graphene can enhance the intensity of the confined electric field surrounding the sensing layer, which results in a stronger light-matter interaction and thereby the improved sensitivity. The sensitivity of graphene-based fiber optic SPR sensor exhibits more than two times larger than that of the conventional gold film SPR fiber optic sensor. Furthermore, the dynamic response analyses reveal that the graphene/Au fiber optic SPR sensor exhibits a fast response (5 s response time) and excellent reusability (3.5% fluctuation) to the protein biomolecules. Such a graphene/Au fiber optic SPR sensor with high sensitivity and fast response shows a great promise for the future biochemical application.
关键词	Fiber optic sensor Surface plasmon resonance Graphene Plastic clad silica fiber
DOI	10.1007/s11468-017-0534-0
发表期刊	PLASMONICS
ISSN	1557-1955
卷号	13期号:2页码:483-491
收录类别	SCI
WOS记录号	WOS:000428074500015
语种	英语