A Numerical Approach to Design the Kretschmann Configuration Based Refractive Index Graphene-MoS2 Hybrid Layers With TiO2-SiO2 Nano for Formalin Detection

Photonic Sensors

Lway F. Abdulrazak¹  Md. Biplob Hossain²  Tamanna Tasnim³  Md. Masud Rana³  Md. Rabiul Islam⁴ 

[1] Department of Computer Science, Cihan University Slemani;Department of Electrical and Electronic Engineering, Jashore University of Science and Technology;Department of Electrical and Electronic Engineering, Rajshahi University of Engineering & Technology;School of Electrical Computer and Telecommunications Engineering, Faculty of Engineering and Information Sciences, University of Wollongong;

关键词: Surface plasmon resonance formalin detection;    grapheme;    refractive index;    sensitivity;   

DOI  :  10.1007/s13320-019-0566-5

来源: DOAJ

【 摘 要 】

Abstract In this paper, a Kretschmann configuration based surface plasmon resonance (SPR) sensor is numerically designed using graphene-MoS2 hybrid structure TiO2-SiO2 nano particles for formalin detection. In this design, the observations of SPR angle versus minimum reflectance and SPR frequency (F SPR) versus maximum transmittance (T max) are considered. The chitosan is used as probe legend to perform reaction with the formalin (40% formaldehyde) which acts as target legend. In this paper, both graphene and MoS2 are used as biomolecular acknowledgment element (BAE) and TiO2 as well as SiO2 bilayers is used to improve the sensitivity of the sensor. The numerical results show that the variation of FSPR and SPR angles for inappropriate sensing of formalin is quite insignificant which confirms the absence of formalin. On the other hand, these variations for appropriate sensing are considerably significant that confirm the presence of formalin. At the end of this article, the variation of sensitivity of the proposed biosensor is measured in corresponding to the increment of a refractive index with a refractive index step 0.01 refractive index unit (RIU). In inclusion of TiO2-SiO2 bilayers with graphene-MoS2, a maximum sensitivity of 85.375% is numerically calculated.

【 授权许可】

Unknown