Decomposition of perfluoropolyethers during XPS measurements

Fu-Ming Pan; Yuh Lin Lin; Shean Ren Horng

doi:10.1016/0169-4332(91)90097-4

Decomposition of perfluoropolyethers during XPS measurements

Fu-Ming Pan^*, Yuh Lin Lin, Shean Ren Horng

^*Corresponding author for this work

Department of Materials Science and Engineering

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

22 Scopus citations

Abstract

Decomposition during XPS measurements of a perfluoropolyether (PFPE) lubricant applied to a gold film has been studied by XPS and mass spectrometry. The decomposition is probably initiated inside the sample either by X-ray photons or secondary electrons created by the photoelectric effect, or by both. The desorption patterns and XPS spectra show that the decomposition behavior for X-ray irradiation is similar to that for electron bombardment. According to XPS results, under X-ray exposure the -O-CF₂-O- unit is the most fragile part in the polymer. Both the X-ray-induced and the electron-induced desorption spectra reveal that OCF₂, CO₂ and C₂F₆ are the primary gas products. A flurocarbonaceous layer with little oxygen content is formed on the gold film surface after X-ray irradiation. The fluorocarbonaceous layer is composed of a straight-chain structure and a cross-linked structure, and probably contains conjugated carbons.

Original language	English
Pages (from-to)	9-16
Number of pages	8
Journal	Applied Surface Science
Volume	47
Issue number	1
DOIs	https://doi.org/10.1016/0169-4332(91)90097-4
State	Published - 1 Jan 1991

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title = "Decomposition of perfluoropolyethers during XPS measurements",

abstract = "Decomposition during XPS measurements of a perfluoropolyether (PFPE) lubricant applied to a gold film has been studied by XPS and mass spectrometry. The decomposition is probably initiated inside the sample either by X-ray photons or secondary electrons created by the photoelectric effect, or by both. The desorption patterns and XPS spectra show that the decomposition behavior for X-ray irradiation is similar to that for electron bombardment. According to XPS results, under X-ray exposure the -O-CF2-O- unit is the most fragile part in the polymer. Both the X-ray-induced and the electron-induced desorption spectra reveal that OCF2, CO2 and C2F6 are the primary gas products. A flurocarbonaceous layer with little oxygen content is formed on the gold film surface after X-ray irradiation. The fluorocarbonaceous layer is composed of a straight-chain structure and a cross-linked structure, and probably contains conjugated carbons.",

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AU - Pan, Fu-Ming

AU - Lin, Yuh Lin

AU - Horng, Shean Ren

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N2 - Decomposition during XPS measurements of a perfluoropolyether (PFPE) lubricant applied to a gold film has been studied by XPS and mass spectrometry. The decomposition is probably initiated inside the sample either by X-ray photons or secondary electrons created by the photoelectric effect, or by both. The desorption patterns and XPS spectra show that the decomposition behavior for X-ray irradiation is similar to that for electron bombardment. According to XPS results, under X-ray exposure the -O-CF2-O- unit is the most fragile part in the polymer. Both the X-ray-induced and the electron-induced desorption spectra reveal that OCF2, CO2 and C2F6 are the primary gas products. A flurocarbonaceous layer with little oxygen content is formed on the gold film surface after X-ray irradiation. The fluorocarbonaceous layer is composed of a straight-chain structure and a cross-linked structure, and probably contains conjugated carbons.

AB - Decomposition during XPS measurements of a perfluoropolyether (PFPE) lubricant applied to a gold film has been studied by XPS and mass spectrometry. The decomposition is probably initiated inside the sample either by X-ray photons or secondary electrons created by the photoelectric effect, or by both. The desorption patterns and XPS spectra show that the decomposition behavior for X-ray irradiation is similar to that for electron bombardment. According to XPS results, under X-ray exposure the -O-CF2-O- unit is the most fragile part in the polymer. Both the X-ray-induced and the electron-induced desorption spectra reveal that OCF2, CO2 and C2F6 are the primary gas products. A flurocarbonaceous layer with little oxygen content is formed on the gold film surface after X-ray irradiation. The fluorocarbonaceous layer is composed of a straight-chain structure and a cross-linked structure, and probably contains conjugated carbons.

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