Abstract
Radiative striations that are formed on the surface of spin-coating films were quantitatively evaluated where the height and spacing of striations were measured by a contact probe surface profilometer. How the height and spacing of striations are affected by sol viscosity, spinning rate, and solvent volatility is described based on our experimental data. Striations are demonstrated to be formed even on stationary substrates, which indicates that the substrate rotation is not necessary for the formation of striations. On the basis of the idea that striations are formed by the same mechanism irrespective of the presence or absence of the substrate rotation, in situ observation was made on sols placed on substrates for understanding of the mechanism. When less volatile alcohols are used, the striations once formed are demonstrated to be diminished during gelation.
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Kozuka, H. (2016). Radiative Striations in Spin-Coating Films. In: Klein, L., Aparicio, M., Jitianu, A. (eds) Handbook of Sol-Gel Science and Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-19454-7_148-1
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DOI: https://doi.org/10.1007/978-3-319-19454-7_148-1
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