Highly Sensitive SPR Sensor Based on Ag-ITO-BlueP/TMDCs-Graphene Heterostructure
- PDF / 1,310,526 Bytes
- 10 Pages / 595.276 x 790.866 pts Page_size
- 22 Downloads / 218 Views
Highly Sensitive SPR Sensor Based on Ag-ITO-BlueP/TMDCs-Graphene Heterostructure Lei Han 1 & Huafeng Ding 1 & Ngaleu Nematchoa Adrien Landry 1 & Menghu Hua 1 & Tianye Huang 1 Received: 14 November 2019 / Accepted: 31 March 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract 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. Keywords Blue phosphorene . Transition metal dichalcogenides . Graphene . Indium tin oxide . Surface plasmon resonance . Sensitivity
Introduction Surface plasmon (SP) wave is sensitive to the change of the refractive index of the sensing medium, and the application of surface plasmon resonance (SPR) in sensor has attracted extensive attention and research. Based on this mechanism, different types of SPR sensor are designed to detect analysis. SPR sensor is a new biochemical detection technology, which has many advantages, such as high sensitivity, convenient detection, and online detection [1–4]. It can be widely used in many fields, such as material science, environmental protection, and food industry, which are directly related to human survival and development [5–8]. In order to improve the performance of SPR, many researchers have studied new materials [9, 10] and incident light in different wavelength [11, 12] and optimized the structure [13, 14]. The traditional SPR sensor is a Kretschmann prism coupling structure, which is no gap between the prism and the metal film. The metal film is directly covered on the bottom of * Tianye Huang [email protected] 1
School of Mechanical Engineering and Electronic Information, China University of Geosciences (Wuhan), Wuhan 430074, China
the prism, and the object under test is placed under the metal film. A beam of monochromatic polarized light is transmitted through the prism, and the SPR phenomenon is excited by changing the incident angle θ of the incident light or changing the wavelength λ [15]. In the traditional SPR sensor, gold (Au) [16], silver (Ag) [17, 18], aluminum (Al) [19], and co
Data Loading...
