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Surface diffusion and flow activation energies of perfluoropolyalkylether

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Abstract

Surface diffusion of perfluoropolyalkylether (PFPE) Fomblin Z15 and Fomblin Zdol (hydroxyl terminated PFPE) on silicon wafers was investigated over the temperature range of 25 to 50°C using scanning microellipsometry. Zdol exhibits a much lower mobility and a distinctly different thickness profile as compared to Z15. The activation energy for surface diffusion of Zdol is higher than that of Z15, reflecting the stronger affinity of its hydroxyl end groups for the substrate. The viscosity flow activation energy E *η is compared with that of surface diffusion E *d yielding E *d ≈ E *η for Z15, and E *d ≈ 1.5E *η for Z

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Authors and Affiliations

  1. Department of Chemical Engineering, Carnegie Mellon University, 15213-3890, Pittsburgh, PA, USA

    Teresa M. O'Connor & Myung S. Jhon

  2. Department of Materials Science and Engineering, Carnegie Mellon University, 15213-3890, Pittsburgh, PA, USA

    Charles L. Bauer

  3. IBM Research Division, Almaden Research Center, 95120-6099, San Jose, CA, USA

    Byung G. Min, Do Y. Yoon & Thomas E. Karis

Authors
  1. Teresa M. O'Connor
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  2. Myung S. Jhon
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  3. Charles L. Bauer
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  4. Byung G. Min
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  5. Do Y. Yoon
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  6. Thomas E. Karis
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Additional information

On leave from Korea Insitute of Science and Technology, PO Box 131, Cheongryang, Seoul, Korea 305-701.

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O'Connor, T.M., Jhon, M.S., Bauer, C.L. et al. Surface diffusion and flow activation energies of perfluoropolyalkylether. Tribol Lett 1, 219–223 (1995). https://doi.org/10.1007/BF00209776

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  • DOI: https://doi.org/10.1007/BF00209776

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