highly sensitive spr sensor based on ag-ito-bluep/tmdcs-graphene heterostructure

The novel surface plasmon resonance (spr) sensor based on hybrid structure of ag-indium tin oxide (ito)-blue phosphorene (bluep)/transition metal dichalcogenides (tmdcs)-graphene is presented. the bluep/tmdcs heterostructure works as an interacting layer with the analyte for the enhancement of the of the sensor’s sensitivity. for angular sensitivity, when the bluep/ws2 and graphene are both monolayer, the highest angular sensitivity with 348.8°/riu is obtained. the maximum angular sensitivity of our proposed spr sensor is about 2.83 times of the conventional sensor. for phase sensitivity, when the bluep/wse2 is monolayer and graphene is bilayer, the highest phase sensitivity with 3.603 × 106 deg/riu is obtained. the highest phase sensitivity of our proposed spr sensor is about 2.78 times of the ag-ito-graphene structure and 4.16 times of the ag-ito structure. the spr sensor has the advantages of high sensitivity, repeatability, and reusability, so it has a good prospect application for food safety detection, biological engineering, medical diagnosis, and biochemical detection.