| Abstrakt: |
Investigating the physical characteristics of Xylenol Orange Dye at various concentrations (5x10-5, 4x10-5, 3x10-5, 2x10-5, and 1x10-5) mol/L was the goal of the current study. The dye concentration (10-3)M was used to prepare the Xylenol Orange films dye, and these are its physical and optical properties. Utilizing an ultraviolet-visible spectrophotometer (UV-Vis), the optical characteristics of the dye samples were measured, including [Absorbance A, Transmittance T, absorption coefficient α, refractive index n⌋, Reflection R, Extinction coefficient k, and Energy gap Eg]., its found that when analyzing the samples with the (UV-Vis) spectrophotometer for different samples, one peak at wavelength of (424, 423, 419, 418, 411) nm was found for the liquid dye samples with a concentration of (5x10-5,4x10-5, 3x10-5, 2x10-5, 1x10-5) mol/L respectively, also it is found one peak at wavelength of (440,439,438)nm for the film dye samples with a thickness of (38, 37, 36) nm respectively. Absorbency for liquid dye samples of highest concentration is less than that absorbance when using as a film dye samples of highest thickness. This depends on the type of sample, whether it is solid or liquid, as the percentage of absorption of the UV-Vis device between them. The energy gap of the liquid dye samples (2.37, 2.38, 2.39, 2.40, 2.41)eV is less value than film dye samples (2.42, 2.43, 2.44) eV. This depends on the type of sample, whether it is solid or liquid, where the size of the energy gap is different between them, where the distance between the particles of the liquid is convergent, in contrast to the energy gap. [ABSTRACT FROM AUTHOR] |
