Document Type : Original Article

Author

• Hajer Mohammed Qasim, Abdulla Abdul Ameer

Abstract

his study includes the preparation of a thin film of Malachite Green dye (MG) by casting method on a glass substrate. the polymethacrylate (PMMA) was applied (0.5ml) with the dye. to increase the adhesion of dye films, On the glass surface, The films were prepared with different concentrations (6mM, 8mM, 10mM, 12mM, and 16mM) to find a best optical property of the films. The linear optical Parameters such as extinction coefficient, refractive index, real and imaginary parts, Urbach energy and optical conductivity. The average refractive index by using the absorbance and transmittance measurement were studied by atomic force microscopy (AFM) study shows that the roughens of films increase with the increase of the dye concentration. Study of linear optical (UV-visible) Spectrophotometer (Shimadzu) the spectral range (200-1100nm) showed an increasing concentration of the dye. the energy gap was estimated in the range of (3.26 -2.64) eV for the different films.

Keywords

• Organic dye
• energy gap
• linear properties
• casting method