Design of an optimized $\text{MoS}_2$-based highly sensitive near-infrared surface plasmon resonance imaging biosensor

TL;DR

This paper presents a highly sensitive near-infrared surface plasmon resonance imaging biosensor based on MoS2 on aluminium, outperforming graphene-based sensors and optimized through various parameters for potential biomolecular detection applications.

Contribution

The paper introduces a novel MoS2-based biosensor design with optimized parameters, achieving superior sensitivity in the near-infrared regime compared to existing graphene-based sensors.

Findings

Achieved sensitivity >970 RIU^{-1} at 1540 nm

Optimized aluminium thickness and MoS2 layers for enhanced performance

Compared MoS2 with other transition metal dichalcogenides in biosensing

Abstract

A surface plasmon resonance imaging biosensor based on $\text{MoS}_2$ deposited on Aluminium substrate is designed for high imaging sensitivity and detection accuracy. The proposed biosensor exhibits better performance than graphene-based biosensor in the near-infrared regime. A high imaging sensitivity of more than 970 $\text{RIU}^{-1}$ is obtained at the wavelength of 1540 nm. The effect of aluminium thickness, number of $\text{MoS}_2$ layers and the refractive index of sensing layer are investigated to obtain an optimized design for high sensor performance. In addition, the sensor performance comparison of $\text{MoS}_2$ and other two-dimensional transition metal dichalcogenide materials based biosensor in the near-infrared regime are also presented. The designed $\text{MoS}_2$ mediated surface plasmon resonance imaging biosensor could provide potential applications in surface plasmon resonance imaging detection of multiple biomolecular interactions simultaneously.