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- W1992488129 abstract "In this study we systematically investigated how the solvent composition used for polymer dissolution affects the porous structures of spin-coated polymers films. Cellulose acetate butyrate (CAB) and poly(methyl methacrylate) with low (PMMA-L) and high (PMMA-H) molecular weights were dissolved in mixtures of acetone (AC) and ethyl acetate (EA) at constant polymer concentration of 10 g/L The films were spin-coated at a relative air humidity of 55 ± 5%, their thickness and index of refraction were determined by means of ellipsometry and their morphology was analyzed by atomic force microscopy. The dimensions and frequency of nanocavities on polymer films increased with the acetone content (φAC) in the solvent mixture and decreased with increasing polymer molecular weight. Consequently, as the void content increased in the films, their apparent thicknesses increased and their indices of refraction decreased, creating low-cost anti-reflection surface. The void depth was larger for PMMA-L than for CAB. This effect was attributed to different activities of EA and AC in CAB or PMMA-L solution, the larger mobility of chains and the lower polarity of PMMA-L in comparison to CAB." @default.
- W1992488129 created "2016-06-24" @default.
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- W1992488129 date "2012-12-01" @default.
- W1992488129 modified "2023-10-14" @default.
- W1992488129 title "Nanostructures on spin-coated polymer films controlled by solvent composition and polymer molecular weight" @default.
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- W1992488129 doi "https://doi.org/10.1016/j.tsf.2012.10.011" @default.
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