Research: Rare Earth Material Glasses
Weighing: We take the calculated items as close as we can measure by the digital balance and finally made a mixture all of them as like Fig. 1 described.
Melting: After making mixture we melt them by our lab furnace. We turned on the furnace on and weight until its temperature rise around 900 degree Celsius. Heavy precaution needed in this step as we are dealing with very high temperature and performing very quickly for making glasses. Fig. 2 describe the some of the environment. |
Annealing: In technical glass production, molten glass is pressed and it rapidly cools as it is removed from the mold. This rapid cooling creates internal stresses within the glass piece. When the glass finally cools to room temperature, stresses in the glass can potentially cause spontaneous breakage. Glass annealing is a controlled process of slowly cooling glass to relieve these internal stresses. After the sample is quenched, it is placed in an alumina boat and in the annealing oven as in Fig. 3.
Smoothing and Polishing: This is the final step for making glass samples. After completing annealing we first polished our sample and then smoothed. For smoothing the samples, we used Cerium Oxide powder on the rotating plate. Fig. 4 demonstrate the arrangements. |
Refractive Index and Error Calculation: By using our lab’s spectrophotometer, we measured the refractive index of the samples and calculated the errors.
Density measurement: For measuring density we followed the Archimedes' principle. We took measurement of the samples in the air and the in the liquid xylene. |
Research: Surface Plasmon Resonance (SPR) Photonic Biosensors
We demonstrated a highly sensitive Kretschmann configuration based surface plasmon resonance (SPR) biosensor with higher detection accuracy (DA) and quality factor (QF). Five layers of biosensor model is proposed using numerical simulation and graphical analysis. Graphene and Transition Metal Di-chalcogenides (TMDCs) are compared with heterostructures of black phosphorus to improve the sensitivity of the biosensors. For other layers Silver (Ag) is coupled with prism CaF2 for better reflectivity, since CaF2 has the less refractive index (RI) than other industrial prisms. These proposed configurations are compared with each other on the basis of sensitivity, DA and QF which are the most important performance parameters for detecting the ability of the biosensor. Among all the types Graphene and TMDCs (MoS2, MoSe2, WS2 and WSe2), sensors with the WS2 layer exhibits the highest sensitivity, QF, and DA. |
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Project: Blind stick for Blind People
This project is a fantastic helper for blind people. By this device a blind people can walk more comfortable than before with detecting obstacle. so it-
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