Abstract
The two-dimensional (2D) heterostructure of black phosphorus (BP)–MXene shows great stability in liquid and gaseous environments. Sensitivity enhancement of a surface plasmon resonance (SPR) sensor utilizing BP and Ti3C2Tx MXene layer is proposed in this work. A CaF2 glass prism is considered as the coupling substrate and 2D Ti3C2Tx MXene as analyte interacting layer. The sensor’s performance is demonstrated in terms of sensitivity and figure-of-merit (FOM) values at an operating wavelength of 633 nm. An extremely high angular sensitivity of 322.46°/RIU is obtained, with a significant FOM value of 55.596/RIU (analyte refractive index ∼ 1.33) for three-layer BP–Ti3C2Tx MXene monolayer based SPR sensor. Further, the sensing of gaseous analyte using the proposed sensor structure is also explored. This work will open new avenues for application of BP–MXene heterostructure in various optoelectronic devices.
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