2DQuantum Materials Enhanced Plasmonic Sensing

Abstract

2D materials are making a huge progress in biosensing applications. Re search groups have been working upon SPR sensing models utilising 2D materials and claimed to get a higher sensitivity in comparison to the con ventional SPR configuration. The main concern of my dissertation project was to have quantum en hancement in sensing, for which 2D materials were taken into consider ation. During the entire period of my project, studies were carried out focusing on the use of simulation methods in order to calculate the sens ing parameters such as Sensitivity, FWHM and FOM, further modelling them for practical purpose. Various configurations were taken into ac count involving silver and copper as metal and 2D materials (graphene, WSe2 and MoS2). Hybrid models were also studied including the above stated configuration. Major work cameintoaccountwhenFOMwastaken into consideration, as none of the research groups spoke about it. For the very same purpose, literature survey was carried further and my major aim was to calculate FOM and get out the best fit model along with thick ness variation of the 2D material being used. Along with, electric field profile was also studied. Meanwhile, some amount of experimental work was carried sideways using rGO as the 2D material, it being exceptionally good in adherence and thus increasing the surface area of the interaction of the propagation modeandanalyte. Ourstudyshowedavariationinresonancewavelength as the thickness of rGO waschanging. Butthisworkdidnotcametoacon clusion and thus could be looked upon in future. Concluding, my work focused on performing simulation methods to look upon the sensor layouts, comparing the sensing parameters to that of the conventional SPR sensors and thus analysing whether that particular configuration is suitable as a sensor or not.