Optical Along with Magnetic Properties of Doped Nano-Structured Mos2 Nano-Films by Spin Coating

Abstract

The supernatant containing 2D nano-flakes of Molybdenum di-sulphide (MoS2) are synthesized and collected using wet chemical synthesis process. The dispersed MoS2 nano-flakes solution is having strong absorbance values at 627 nm and 690 nm conforming to an energy band gap BG of 1.79 eV and 1.98 eV. Thereafter, MoS2 thin films with and without magnetic doping (cobalt) are deposited on n type silicon by spin coating technique. These samples are placed in the quartz boat then and annealed in a thermal furnace at 260oC for 40 min in Nitrogen gas environment. The AFM imaging of these samples revealed average lateral dimensions of nano-flakes to be from 100 to 200 nm. The magnetization curves with respect to the applied field for both samples are studied using Vibrating Sample Magnetometer (VSM). The VSM measurements, conducted at room temperature, verified the presence of the magnetic property that was introduced, as well as the hysteresis loop, in the thin films of Cobalt-doped MoS2.

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References

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