PubMed · 15745012
Quantification of fluorine density in the outermost atomic layer.
Abstract
The outermost atomic layer of perfluorinated thiol monolayers on gold and poly(tetrafluoroethylene) (PTFE) is analyzed by low-energy ion scattering. Absolute quantification of fluorine density in this layer was achieved after calibrating the fluorine signal with a freshly cleaved LiF(100) single crystal. The fluorine density of monolayers of a C8F17-thiol on gold was 1.48 x 10(15) F atoms/cm2, whereas for PTFE a value of 1.24 x 1015 F atoms/cm2 was observed. This difference was explained by the different tilt angles of the thiol on gold and PTFE chains with respect to the surface normal. Both a configurational and a molecular interpretation on the perfluorinated thiol monolayer on gold are given.
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R D van de Grampel, W Ming, A Gildenpfennig, J Laven, H H Brongersma, G de With, R van der Linde. 2004-01-06. Quantification of fluorine density in the outermost atomic layer.. https://doi.org/10.1021/la0353071
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