In this paper the results of the computer simulation of the oxygen atom interaction with carbon and boron nitride nanostructures are presented. We apply density functional theory method for studying oxygen adsorption on nanostuctures and density functional tight-binding method for modeling hyperthermal oxygen atom impact on these objects. Various nanostructures: carbon and boron nitride nanotubes (CNTs, BNNTs), graphene and sheet of hexagonal boron nitride (h-BN), nanoribbons, etc., will be in the near future applied in spacecraft design both as fillers in nanocomposites and as separate materials. Such materials can be situated on the external surface of spacecraft. In low-Earth orbits (LEO) one of the main factors that cause the surface materials damage is atomic oxygen (AO) of the Earth's upper atmosphere. High relative kinetic energy of oxygen atoms (about 5 eV) due to the spacecraft orbital velocity enhances their reactivity and opens additional pathways of their reaction with near-surface layers of materials. AO impact leading to erosion and mass losses of materials is well studied for conventional bulk spacecraft materials but the data concerning the damage of nanostructures and nanomaterials under AO exposure are quite limited, and the computer simulation can become an efficient mean for its investigation. In this paper the results of computer simulation of the structural changes of the mentioned nanostructures, including CNT and BNNT unzipping, under the attack of oxygen atoms are presented.


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    Title :

    Atomic oxygen influence on nanostructures


    Additional title:

    Einfluss von atomarem Sauerstoff auf Nanostrukturen


    Contributors:


    Publication date :

    2012


    Size :

    4 Seiten, 10 Bilder, 14 Quellen




    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




    Atomic Oxygen Influence on Nanostructures

    Voronina, E.N. / Novikov, L.S. / European Space Agency | British Library Conference Proceedings | 2013


    Atomic Oxygen

    L. J. Leger / J. T. Visentine | NTIS | 1989


    Atomic oxygen

    Leger, Lubert J. / Visentine, James T. | NTRS | 1989