1999
DOI: 10.1021/jp9921553
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Competition between Surface Layering and Surface Phase Formation in Dilute Liquid Hg−Au Alloys

Abstract: The Harvard community has made this article openly available. Please share how this access benefits you. Your story matters. ReceiVed: June 25, 1999; In Final Form: August 17, 1999 We present temperature-dependent X-ray reflectivity measurements of liquid Hg alloyed with 0.06-0.20 atom % Au. At low Au concentrations, we find temperature-dependent surface-induced layering similar to that observed in pure Hg, except that the presence of Au reduces the layering amplitude. Upon approaching the solubility limit … Show more

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Cited by 10 publications
(8 citation statements)
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“…The expression (γ/InXnormali)normalT is the surface energy as a function of composition and temperature of the alloy. However, this surface segregation occurs in thin atomic‐scale (1–2 atoms thick) at the liquid alloy interface, [ 6 ] and with modulating the surface energy of the liquid alloy via electrocapillary, it is possible to magnify the perturbation depth into the liquid alloy.…”
Section: Introductionmentioning
confidence: 99%
“…The expression (γ/InXnormali)normalT is the surface energy as a function of composition and temperature of the alloy. However, this surface segregation occurs in thin atomic‐scale (1–2 atoms thick) at the liquid alloy interface, [ 6 ] and with modulating the surface energy of the liquid alloy via electrocapillary, it is possible to magnify the perturbation depth into the liquid alloy.…”
Section: Introductionmentioning
confidence: 99%
“…Subsequent studies of the mercury surface discovered non capillary-wave-like temperature-dependent surface fluctuations 31 and surface segregation in mercury/gold alloys. 32 The first reported X-ray scattering investigation of organic molecular layers on the mercury surface was for stearic acid at a high surface coverage. 33 In that study an ordered monolayer structure was proposed on the basis of grazing incident angle diffraction studies alone.…”
Section: Introductionmentioning
confidence: 99%
“…The present investigations build on earlier X-ray scattering studies of the mercury surface. The first Ångström-resolution determination of surface structure of the bare mercury surface was reported a decade ago, where a quasi-Bragg layering peak was observed. Subsequent studies of the mercury surface discovered non capillary-wave-like temperature-dependent surface fluctuations 31 and surface segregation in mercury/gold alloys . The first reported X-ray scattering investigation of organic molecular layers on the mercury surface was for stearic acid at a high surface coverage .…”
Section: Introductionmentioning
confidence: 99%
“…The experiment was performed at beamline X25 at the National Synchrotron Light Source using a specialized BNL-designed liquid surface spectrometer. Details of the sample preparation and measurement technique have been given previously, 3 except that for this experiment, a vertically de ecting Si(111) double crystal monochromator upstream of the spectrometer was used to improvetheenergy resolution to 10 eV.…”
Section: Introductionmentioning
confidence: 99%
“…1,2 Especially interesting behavior was found for liquid Hg-Au alloys near the room temperature solubility limit of 0.14at% Au in Hg. 3 The complicated phase behavior of Hg-Au alloys has long been known, from bulk structural studies, 4 and from studies at the solid amalgam surface. 5 Further motivation for studying liquid Hg alloys comes from experiments in which metal impurities were observed to a ect the activation energies of reactions catalyzed by the liquid Hg surface.…”
Section: Introductionmentioning
confidence: 99%