Quantification of Fluorine Density in the Outermost Atomic Layer

R. D. Van de Grampel; W. Ming; A. Gildenpfennig; J. Laven; H. H. Brongersma; G. De With; R. Van der Linde

doi:10.1021/la0353071

Quantification of Fluorine Density in the Outermost Atomic Layer

R. D. Van de Grampel, W. Ming, A. Gildenpfennig, J. Laven, H. H. Brongersma, G. De With, R. Van der Linde

Biochemistry, Chemistry & Physics

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

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 C₃F₁₇-thiol on gold was 1.48 × 10¹⁵ F atoms/cm², whereas for PTFE a value of 1.24 × 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.

Original language	English
Pages (from-to)	145-149
Number of pages	5
Journal	Langmuir
Volume	20
Issue number	1
DOIs	https://doi.org/10.1021/la0353071
State	Published - Jan 6 2004

Scopus Subject Areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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title = "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 C3F17-thiol on gold was 1.48 × 1015 F atoms/cm2, whereas for PTFE a value of 1.24 × 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.",

author = "{Van de Grampel}, {R. D.} and W. Ming and A. Gildenpfennig and J. Laven and Brongersma, {H. H.} and {De With}, G. and {Van der Linde}, R.",

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T1 - Quantification of Fluorine Density in the Outermost Atomic Layer

AU - Van de Grampel, R. D.

AU - Ming, W.

AU - Gildenpfennig, A.

AU - Laven, J.

AU - Brongersma, H. H.

AU - De With, G.

AU - Van der Linde, R.

PY - 2004/1/6

Y1 - 2004/1/6

N2 - 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 C3F17-thiol on gold was 1.48 × 1015 F atoms/cm2, whereas for PTFE a value of 1.24 × 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.

AB - 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 C3F17-thiol on gold was 1.48 × 1015 F atoms/cm2, whereas for PTFE a value of 1.24 × 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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Quantification of Fluorine Density in the Outermost Atomic Layer

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