Search

Nanoparticles-based sensors have many benefits in sensitivity and specificity over traditional sensors. Nanoparticles-based sensors have more specificity due to operation at a small scale and hence the new properties on that basis. A novel, simple and highly sensitive method for the identification of the spoiled milk was developed based on measuring the percentage of lactic acid in spoiled milk by a functionalized nanoparticles sensor. In the present study silver nanoparticles were synthesized by chemical method and functionalized with cysteine and histidine. The nanoparticles were characterized by Dynamic light scattering (DLS) and UV-Visible spectroscopy (UV-Vis). A distinct color change was observed by the addition of functionalized nanoparticle to spoiled milk. Amino acids are helping in binding of nanoparticles and lactic acid resulting in the aggregation of nanoparticle. With the increase in the lactic acid concentration, thereby depicting the color change.

2D Molybdenum disulfide (MoS 2 ) is one among the most significant transition metal dichalcogenides which is attracting a wide range of research interests due to its potential applications in a broad spectrum. Monolayer of MoS 2 shows a direct band gap in the range of 1.8 eV and its layer dependence related to the band structure addresses the perennial problems related to graphene. Its applicability in such a versatile spectrum makes it an interesting candidate of study and this review attempts to explain the structure, properties and different characterization methods of 2D MoS 2 .