Tuning and Sensitivity Enhancement of Surface Plasmon Resonance Biosensor With Graphene Covered Au-MoS2-Au Films
Tuning and Sensitivity Enhancement of Surface Plasmon Resonance Biosensor With Graphene Covered Au-MoS2-Au Films
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DOI：
10.1109/jphot.2016.2631407
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发表时间：
2016-12-01
影响因子：
2.4
通讯作者：
Fan, Dianyuan
中科院分区：
文献类型：
--
作者：
Lin, Zhitao;Jiang, Leyong;Fan, Dianyuan
在传统的表面等离子体共振生物传感器中，采用角探测的灵敏度较低。在金属表面附着石墨烯/MoS2，提高了灵敏度；然而，提高灵敏度的能力是有限的。在这里，通过将MoS2片以Kretschmann结构夹在两个金薄膜之间，我们展示了一个超灵敏的表面等离子体共振传感器。通过优化传感器结构，我们发现用4层MoS2和单层石墨烯可以实现高达182度/RIU的灵敏度。此外，还表明通过改变石墨烯和二硫化钼的层数可以调节和控制灵敏度。
In the conventional surface plasmon resonance biosensor, the sensitivity using angular interrogation is low. Graphene/MoS2 has been attached on the metal surface to improve the sensitivity; however, the ability to improve sensitivity is limited. Here, by sandwiching the MoS2 sheets between two gold films in the Kretschmann configuration, we demonstrate an ultrasensitive surface plasmon resonance sensor. By optimizing the structure of sensor, we find that the sensitivity as high as 182 degrees/RIU can be realized with 4-layers MoS2 and a monolayer graphene. Moreover, it is indicated that the sensitivity can be tuned and controlled by changing the layer numbers of graphene and MoS2.