Enhanced growth instability of strained film on curved substrate

ORAL

Abstract

We report linear stability analysis of a strained film on a curved surface. We show that the growth of a strained film is inherently less stable on a curved substrate than on a flat substrate. For small surface undulation, the lowest strain energy stat4e is for the film surface to adopt the same wavelength as the substrate surface in an anti-phase configuration. Our analysis provides some qualitative understanding of directed self-assembly of quantum dots on patterned substrates.

*DOE (DE-Fg-03ER45875)

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Authors

  • Yu Zhang

    • University of Utah

  • Feng Liu

    • Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112
    • University of Utah
    • Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112 USA
    • Department of Materials Science and Engineering, Univeristy of Utah, Salt Lake City, UT 84112
    • Department of Material Science and Engineering, University of Utah, Salt Lake City, UT 84112-0610, USA
    • Department of Material Science and Engineering, University of Utah, Salt Lake City, UT 84112

  • Feng Liu

    • Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112
    • University of Utah
    • Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112 USA
    • Department of Materials Science and Engineering, Univeristy of Utah, Salt Lake City, UT 84112
    • Department of Material Science and Engineering, University of Utah, Salt Lake City, UT 84112-0610, USA
    • Department of Material Science and Engineering, University of Utah, Salt Lake City, UT 84112