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  • 1
    Electronic Resource
    Electronic Resource
    Potential applications of hyperthermal atomic oxygen for treatment of materials and structures (1995)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 23 (1995), S. 289-298 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Many polymer-based materials degrade in low earth orbit (LEO), mainly due to the damaging environmental effects of hyperthermal or fast atomic oxygen of energy E ∼ 5 eV and solar vacuum ultraviolet radiation. Fast atomic oxygen fluxes of similar energies are generated now in ground-based facilities that are used for accelerated testing of materials.This paper presents a brief overview of the effects of interaction of fast atomic oxygen fluxes with polymer-based materials in the LEO space environment and in ground-based simulators, and discusses a few possible applications of fast atomic oxygen fluxes. Such applications can lead to considerable advantages over plasma treatment, aimed at improvement of adhesion-related and optical properties of polymer-based materials, high-quality precise photoresist etching and passivative oxidation of advanced semiconductor materials, and modified or entirely new surface properties of biomaterials and chemical sensors.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740230504
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Surface structure and properties of polymers irradiated with hyperthermal atomic oxygen (1995)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 23 (1995), S. 335-341 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Surface properties of Kapton® were analysed after different exposures to ground state fast atomic oxygen (FAO) and vacuum ultraviolet radiation in the atomic oxygen beam facility at the University of Toronto Institute for Aerospace Studies. X-ray photoelectron spectroscopy, scanning electron microscopy and contact angle measurements were used to characterize the chemical and physical changes to the surfaces of the materials analysed. The most important changes in the surface chemistry of Kapton induced by the various exposures to FAO were oxidative degradation of the polymer and substantial changes in supermolecular organization and morphology of the surface layer. A very weak adhesion of the rough top layer to the original Kapton has been observed after an atomic oxygen irradiation with a total fluence of 1.3 × 1021 atoms cm-2, which is comparable to some low earth orbit (LEO) exposures. Comparison was made between pristine samples and the cleaned surface of samples that had been exposed in the atomic oxygen beam facility and in the LEO environment. An ageing effect was observed in the surface layer of exposed samples after a prolonged storage. For several polymer materials, a correlation was found between the erosion yield when exposed to FAO and the dispersion component of the surface tension of the pristine material.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740230510
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    Paper (German National Licenses)
    Fulltext
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