Spreading of a mercury droplet on thin gold films

Avraham Be'er, Yossi Lereah, Aviad Frydman and Haim Taitelbaum

Physica A: Statistical Mechanics and its Applications, 2002, vol. 314, issue 1, 325-330

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).

Keywords: Thin films; Surface growth; Diffusion; Reaction (search for similar items in EconPapers)
Date: 2002
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:314:y:2002:i:1:p:325-330

DOI: 10.1016/S0378-4371(02)01192-5

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