Monolayers EXAFS studies

The Cu adsorbate structure was studied using STM and EXAFS (extended x-ray absorption fine structure) techniques, but it is not yet well understood. UPD-OPD transition is in the range —82 to —71 mV. Bulk fee Cu spacing is reached after deposition of about lOCu monolayers. Holzle et al. (72) have shown that UPD Cu deposition on Au(l 11) is a combined adsorption-nucleation and growth process. 

The quasi-ideality of the (1 x l)Co/Cu(lll) and (1 x l)Co/Cu(110) monolayer interfaces allows a temperature dependent study of the polarisation dependent Debye Waller damping of the EXAFS oscillations i.e the analysis of the amplitude of the mean square relative displacements of the Co atoms parallel to the adsorbate layer, or perpendicular to it. The results are based on the analysis of data collected with the sample temperature T = 77 K and T = 300 K. The S—S and S—B (see above)... 

McKeown DA, Waychunas GA, Brown GE Jr (1985b) EXAFS and XANES study of the local coordination environment of sodium in a series of silica-rich glasses and selected minerals within the sodium aluminosilicate system. J Non-Crystal Solids 74 325-348 Miranda PB, Xu L, Shen YR, Salmeron M (1998) Icelike water monolayers adsorbed on mica at room temperature. Phys Rev Lett 81 5876-5879... 

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