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.",

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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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DO - 10.1021/la0353071

M3 - Article

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VL - 20

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EP - 149

JO - Langmuir

JF - Langmuir

IS - 1

ER -

Quantification of Fluorine Density in the Outermost Atomic Layer

Abstract

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