Sensitivity and Stability Enhancement of Surface Plasmon Resonance Biosensors based on a Large-Area Ag/MoS2 Substrate

被引：37
|
作者：
Kim, Nak-Hyeon [1 ]
Choi, Munsik [2 ]
Kim, Tae Woo [3 ]
Choi, Woong [4 ]
Park, Sang Yoon [1 ]
Byun, Kyung Min [2 ]
机构：
[1] Seoul Natl Univ, Adv Inst Convergence Technol, Suwon 16229, South Korea
[2] Kyung Hee Univ, Dept Biomed Engn, Coll Elect & Informat, Yongin 17104, South Korea
[3] Kyung Hee Univ, Sch East West Med Sci, Yongin 17104, South Korea
[4] Kookmin Univ, Sch Adv Mat Engn, Seoul 02707, South Korea
来源：
SENSORS | 2019年 / 19卷 / 08期
基金：
新加坡国家研究基金会;
关键词：
surface plasmon resonance; biosensor; MoS2; monolayer; oxidation; sensitivity enhancement; HYBRID NANOSTRUCTURES; GRAPHENE; TRANSITION; SENSOR; FILMS;
D O I：
10.3390/s19081894
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Surface plasmon resonance (SPR) sensors based on a silver film suffer from signal degradation due to silver oxidation in aqueous sensing environments. To overcome this limitation, we fabricated the planar plasmonic substrate employing an atomic MoS2 layer on a silver surface. Successful production of a large-area MoS2 monolayer blocks the penetration of oxygen and water molecules. In addition, we theoretically and experimentally found that MoS2 layer on the silver film can improve the SPR sensitivity and stability significantly. In this study, the proposed SPR substrate has the potential to provide highly enhanced sensor platforms for surface-limited molecular detections.
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页数：8
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