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Comparison and Characterization Studies on Mero and Carbocyanine Dye Film Using Low Temperature Plasma

Vijayalakshmi KA, Lavanya Dhevi R and Ranjitha S

In the present work Mero and Carbocyanine dye film have been exposed to dc glow discharge plasma to improve their surface properties for technical application. Surface composition and morphology of the films were analyzed by scanning electron microscope (SEM). Crystallinity of the plasma treated samples of Mero and Carbocyanine dye films were studied by powder X-ray diffraction analysis (PXRD). It was found that plasma treatment modifies the surface both in chemical composition and morphology. The thermal stability of the film was studied by differential thermal analysis and thermogravimetric analysis (DTA-TGA). The presence of various functional groups and optical property of the cyanine dye films are analyzed using Fourier transform infrared spectroscopy (FTIR) and UV-visible spectroscopy (UV-Vis-NIR). The nonlinear optical property of the film was studied by Kurtz-Perry powder technique.