Role of low-level impurities and intercalated molecular gases in the α particle radiolysis of polytetrafluoroethylene examined by static time-of-flight secondary-ion-mass spectrometery

Gregory L. Fisher; Christopher Szakal; Christopher J. Wetteland; Nicholas Winograd

doi:10.1116/1.2167982

Role of low-level impurities and intercalated molecular gases in the α particle radiolysis of polytetrafluoroethylene examined by static time-of-flight secondary-ion-mass spectrometery

Gregory L. Fisher, Christopher Szakal, Christopher J. Wetteland, Nicholas Winograd

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

3 Scopus citations

Abstract

The structural degradation of polytetrafluoroethylene (PTFE) upon irradiation with MeV alpha (α) particles is accompanied by the proliferation of hydrogenated and oxygen-functionalized fluorocarbon species. In this article, we explore the origin of monoxide- and dioxide-functionalized fluorocarbon species that emerge upon α particle irradiation of PTFE. Samples of neat PTFE were irradiated to α doses in the range of 107 -5× 1010 rad using 5.5 MeV He 2+ 4 ions produced in a tandem accelerator. Static time-of-flight secondary-ion-mass spectrometry (TOF-SIMS), using a 20 keV C60+ source, was employed to probe chemical changes as a function of α particle irradiation. Chemical images and high-resolution mass spectra were collected in both the positive and negative polarities. Residual gas analysis, utilized to monitor the liberation of molecular gases during α particle irradiation of the PTFE in vacuum, is discussed in relationship to the TOF-SIMS data.

Original language	English (US)
Article number	017604JVA
Pages (from-to)	1166-1171
Number of pages	6
Journal	Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume	24
Issue number	4
DOIs	https://doi.org/10.1116/1.2167982
State	Published - Jul 2006

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films

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Fisher, G. L., Szakal, C., Wetteland, C. J., & Winograd, N. (2006). Role of low-level impurities and intercalated molecular gases in the α particle radiolysis of polytetrafluoroethylene examined by static time-of-flight secondary-ion-mass spectrometery. Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films, 24(4), 1166-1171. Article 017604JVA. https://doi.org/10.1116/1.2167982

Fisher, Gregory L. ; Szakal, Christopher ; Wetteland, Christopher J. et al. / Role of low-level impurities and intercalated molecular gases in the α particle radiolysis of polytetrafluoroethylene examined by static time-of-flight secondary-ion-mass spectrometery. In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films. 2006 ; Vol. 24, No. 4. pp. 1166-1171.

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title = "Role of low-level impurities and intercalated molecular gases in the α particle radiolysis of polytetrafluoroethylene examined by static time-of-flight secondary-ion-mass spectrometery",

abstract = "The structural degradation of polytetrafluoroethylene (PTFE) upon irradiation with MeV alpha (α) particles is accompanied by the proliferation of hydrogenated and oxygen-functionalized fluorocarbon species. In this article, we explore the origin of monoxide- and dioxide-functionalized fluorocarbon species that emerge upon α particle irradiation of PTFE. Samples of neat PTFE were irradiated to α doses in the range of 107 -5× 1010 rad using 5.5 MeV He 2+ 4 ions produced in a tandem accelerator. Static time-of-flight secondary-ion-mass spectrometry (TOF-SIMS), using a 20 keV C60+ source, was employed to probe chemical changes as a function of α particle irradiation. Chemical images and high-resolution mass spectra were collected in both the positive and negative polarities. Residual gas analysis, utilized to monitor the liberation of molecular gases during α particle irradiation of the PTFE in vacuum, is discussed in relationship to the TOF-SIMS data.",

author = "Fisher, {Gregory L.} and Christopher Szakal and Wetteland, {Christopher J.} and Nicholas Winograd",

note = "Funding Information: One of the authors (G.L.F.) would like to acknowledge Chad Meserole for critical discussions and review of this manuscript. Financial support for this research was provided by the United States Department of Energy under Contract No. W-7405-ENG. ",

year = "2006",

month = jul,

doi = "10.1116/1.2167982",

language = "English (US)",

volume = "24",

pages = "1166--1171",

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Fisher, GL, Szakal, C, Wetteland, CJ & Winograd, N 2006, 'Role of low-level impurities and intercalated molecular gases in the α particle radiolysis of polytetrafluoroethylene examined by static time-of-flight secondary-ion-mass spectrometery', Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films, vol. 24, no. 4, 017604JVA, pp. 1166-1171. https://doi.org/10.1116/1.2167982

Role of low-level impurities and intercalated molecular gases in the α particle radiolysis of polytetrafluoroethylene examined by static time-of-flight secondary-ion-mass spectrometery. / Fisher, Gregory L.; Szakal, Christopher; Wetteland, Christopher J. et al.
In: Journal of Vacuum Science and Technology A: Vacuum, Surfaces and Films, Vol. 24, No. 4, 017604JVA, 07.2006, p. 1166-1171.

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

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AU - Wetteland, Christopher J.

AU - Winograd, Nicholas

N1 - Funding Information: One of the authors (G.L.F.) would like to acknowledge Chad Meserole for critical discussions and review of this manuscript. Financial support for this research was provided by the United States Department of Energy under Contract No. W-7405-ENG.

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N2 - The structural degradation of polytetrafluoroethylene (PTFE) upon irradiation with MeV alpha (α) particles is accompanied by the proliferation of hydrogenated and oxygen-functionalized fluorocarbon species. In this article, we explore the origin of monoxide- and dioxide-functionalized fluorocarbon species that emerge upon α particle irradiation of PTFE. Samples of neat PTFE were irradiated to α doses in the range of 107 -5× 1010 rad using 5.5 MeV He 2+ 4 ions produced in a tandem accelerator. Static time-of-flight secondary-ion-mass spectrometry (TOF-SIMS), using a 20 keV C60+ source, was employed to probe chemical changes as a function of α particle irradiation. Chemical images and high-resolution mass spectra were collected in both the positive and negative polarities. Residual gas analysis, utilized to monitor the liberation of molecular gases during α particle irradiation of the PTFE in vacuum, is discussed in relationship to the TOF-SIMS data.

AB - The structural degradation of polytetrafluoroethylene (PTFE) upon irradiation with MeV alpha (α) particles is accompanied by the proliferation of hydrogenated and oxygen-functionalized fluorocarbon species. In this article, we explore the origin of monoxide- and dioxide-functionalized fluorocarbon species that emerge upon α particle irradiation of PTFE. Samples of neat PTFE were irradiated to α doses in the range of 107 -5× 1010 rad using 5.5 MeV He 2+ 4 ions produced in a tandem accelerator. Static time-of-flight secondary-ion-mass spectrometry (TOF-SIMS), using a 20 keV C60+ source, was employed to probe chemical changes as a function of α particle irradiation. Chemical images and high-resolution mass spectra were collected in both the positive and negative polarities. Residual gas analysis, utilized to monitor the liberation of molecular gases during α particle irradiation of the PTFE in vacuum, is discussed in relationship to the TOF-SIMS data.

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Role of low-level impurities and intercalated molecular gases in the α particle radiolysis of polytetrafluoroethylene examined by static time-of-flight secondary-ion-mass spectrometery

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