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In this paper, we investigated Disperse Red (DR1, DR13) and Disperse Orange (DO3, DO13) dyes embedded into poly(methyl methacrylate) (PMMA) polymeric matrix. The linear optical properties such as absorption coefficient, refractive index and energy band-gap of guest-host polymeric thin films were studied using spectroscopy and spectroscopic ellipsometry combined with transmittance measurements. We found that the refractive index of DR1 is higher than the refractive indices for other studied azo dyes compounds. We also observed that the energy band-gap of studied materials varies from about 2 eV to 2.3 eV.
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Derkowska‐Zielinska et al. (2016) studied this question.
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