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Spreading of a mercury droplet on thin gold films

Author

Listed:
  • Be'er, Avraham
  • Lereah, Yossi
  • Frydman, Aviad
  • Taitelbaum, Haim

Abstract

The spreading of a small mercury droplet (150μm) on thin gold films is studied, using an optical microscope enhanced with a differential interference contrast system. The growing interfaces are analyzed in order to determine the roughness (α) and growth (β) exponents. For gold film thickness of 1500Å we find that α=0.88±0.03 and β=0.76±0.03, while for gold thickness of 3000Å, α=0.96±0.04 and β=1.00±0.04. Both sets of exponents satisfy the scaling relation α+α/β=2. In both systems the roughness exponent α crosses over to a value close to 0.5 in the final stages of the experiment and for relatively long length scales (order of a few microns).

Suggested Citation

  • Be'er, Avraham & Lereah, Yossi & Frydman, Aviad & Taitelbaum, Haim, 2002. "Spreading of a mercury droplet on thin gold films," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 314(1), pages 325-330.
    • Handle: RePEc:eee:phsmap:v:314:y:2002:i:1:p:325-330
    DOI: 10.1016/S0378-4371(02)01192-5
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