Optical study of MoSe2-poly(methyl methacrylate) polymer nanocomposites

The Two dimensional (2D) transition metal dichalcogenides material Molybdenum Diselenide (MoSe2) is synthesized by route of hydrothermal method. UV-vis Spectroscopy and X-Ray Diffraction (XRD) confirms that MoSe2 has been synthesized. Further, polymer composites of MoSe2 /Poly (methyl methacrylate) (PMMA) are formed and optical properties of its thin film are studied. MoSe2 nanosheets show the diffraction peak at 2θ=14.04°, 33.52° and 54.38° whereas in MoSe2-PMMA nanocomposite amorphous nature is observed. The Optical Energy band gap of MoSe2 and its composite is calculated to be 1.6eV and 2.75eV respectively. The averaged value of refractive index is found to be 4.94 in case of PMMA-MoSe2 nanocomposite whereas for MoSe2 it was obtained 1.35. There is a rise in extinction coefficient (k) values in case of polymer nanocomposite. Moreover, dielectric constant (ei) showed a direct relation with refractive index (n).The Two dimensional (2D) transition metal dichalcogenides material Molybdenum Diselenide (MoSe2) is synthesized by route of hydrothermal method. UV-vis Spectroscopy and X-Ray Diffraction (XRD) confirms that MoSe2 has been synthesized. Further, polymer composites of MoSe2 /Poly (methyl methacrylate) (PMMA) are formed and optical properties of its thin film are studied. MoSe2 nanosheets show the diffraction peak at 2θ=14.04°, 33.52° and 54.38° whereas in MoSe2-PMMA nanocomposite amorphous nature is observed. The Optical Energy band gap of MoSe2 and its composite is calculated to be 1.6eV and 2.75eV respectively. The averaged value of refractive index is found to be 4.94 in case of PMMA-MoSe2 nanocomposite whereas for MoSe2 it was obtained 1.35. There is a rise in extinction coefficient (k) values in case of polymer nanocomposite. Moreover, dielectric constant (ei) showed a direct relation with refractive index (n).