The absorption and binding energy of material plays an important role with a large surface area and conductivity for the development of any sensing device. The newly grown 2D nanomaterials like black phosphorus transition metal dichalcogenides (TMDCs) or graphene have excellent properties for sensing devices’ fabrication. This paper summarizes the progress in the area of the 2D nanomaterial-based surface plasmon resonance (SPR) sensor during last decade. The paper also focuses on the structure of Kretschmann configuration, the sensing principle of SPR, its characteristic parameters, application in various fields, and some important recent works related to SPR sensors have also been discussed, based on the present and future scope of this field. The present paper provides a platform for researchers to work in the field of 2D nanomaterial-based SPR sensors.

Chalcogenides are compound formed predominately from one or more of the chalcogen elements; Sulfur, Selenium, and Tellurium. Although they were studied some fifty years ago, interest in chalcogenide glasses has emerged significantly as glasses, crystals, and alloys find new life in the wide range of optoelectronic devices. Various non-oxide glasses have been prepared and characterized in last few decades, thus widening the groups of chalcogen materials used in various optoelectronic glasses. The present review describes the composition of chalcogenide glasses, their synthesis and fabrication, their physical properties and potential applications in optoelectronics. Subsequently, current research and future prospects of chalcogenide glasses have been sketched. A comprehensive review on chalcogenide glasses shall further help the researchers to expedite their research work in this area.

A novel surface plasmon resonance-based biosensor for SARS-CoV-2 virus is proposed in this article. The biosensor is a Kretschmann configuration-based structure that consists of CaF₂ prism as base, at which silver (Ag), TiO₂, and MXene nanolayers are used to enhance the performance. Theoretically, the performance parameters have been investigated by means of Fresnel equations and transfer matrix method (TMM). The TiO₂ nanolayer not only prevents oxidation of Ag layer but also enhances the evanescent field in its vicinity. The sensor provides an ultrahigh angular sensitivity of 346°/RIU for the detection of SARS-CoV-2 virus. Some other performance parameters, including FWHM (full width at half maxima), detection accuracy (DA), limit of detection (LOD), and quality factor (QF) have also been calculated for proposed SPR biosensor with their optimized values 2.907°, 0.3439 deg⁻¹, 1.445 × 10⁻⁵, and 118.99 RIU⁻¹, respectively. The obtained results designate that the proposed surface plasmon resonance (SPR) based biosensor has notably enhanced angular sensitivity as compared to previous results reported in the literatures till date. This work may facilitate a significant biological sample sensing device for fast and accurate diagnosis at early stage of SARS-CoV-2 virus.