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Optical Viscometry of Spinning Sol Coatings

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Abstract

Optical interferometric monitoring of spin coating (optospinography) has allowed close observation of the temporal evolution of a thin silicate sol film (typically at 2000 rpm, 100 Hz data acquisition). The kinematic viscosity data obtained, using a simple analytical model, are validated with those from a mineral oil standard, with agreement well within the experimental uncertainties. For spin coating in open air, the influence of variations in refractive index, rheological properties and air flow are discussed. Inflections in the temporal evolution of the optical thickness of silicate sol films are analyzed, which indicate the usefulness of optospinography, particularly when applied in the proximity of the rotation axis and evaporation is minimized, to monitor time variations in the kinematic viscosity of these sols during spin coating.

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References

  1. C.J. Brinker and G.W. Scherer, Sol-gel science: the physics and chemistry of sol-gel processing, (Academic Press, San Diego, 1990), chap. 3.

    Google Scholar 

  2. R. Xu, E.J.A. Pope, and J.D. Mackenzie, J. Non-Cryst. Sol. 106, 242 (1988).

    Google Scholar 

  3. F. Horowitz, E.M. Yeatman, E.J.C. Dawnay, and M.A. Fardad, J. Phys. III France 3, 2059 (1993); F. Horowitz, E.J.C. Dawnay, M.A. Fardad, Mino Green, and E.M. Yeatman, J. Nonlin., Opt. Phys. Mat. 6, 1 (1997).

    Google Scholar 

  4. F. Horowitz, A. Bacchieri, A. Michels, E.M. Yeatman, and H.P. Grieneisen, SPIE Proc. 2861, 164 (1996).

    Google Scholar 

  5. A.G. Emslie, F.T. Bonner, and L.G. Peck, J. Appl. Phys. 29, 858 (1958).

    Google Scholar 

  6. P.C. Sukanek, J. Electrochem. Soc. 138(6), 1712 (1991).

    Google Scholar 

  7. K. Vorotilov, V. Petrovsky, and V. Vasiljev, J. Sol-Gel Sci. Tech. 5, 173 (1995).

    Google Scholar 

  8. D.E. Bornside, R.A. Brown, P.W. Ackmann, J.R. Frank, A.A. Tryba, and F.T. Geyling, J. Appl. Phys. 73(2), 585 (1993).

    Google Scholar 

  9. T.J. Rehg and B.G. Higgins, AIChE Journal 38(4), 489 (1992).

    Google Scholar 

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Horowitz, F., Michels, A. & Yeatman, E. Optical Viscometry of Spinning Sol Coatings. Journal of Sol-Gel Science and Technology 13, 707–712 (1998). https://doi.org/10.1023/A:1008697023104

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  • DOI: https://doi.org/10.1023/A:1008697023104

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