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oai:rodare.hzdr.de:3734 2025-11-20T13:25:13Z openaire_data openaire_data openaire_data openaire_data openaire_data user-rodare

true 3.1 HZDR.RODARE 10.14278/rodare.3734 Becker, Alexandra 0009-0004-2903-7242 Zeller, Genrich 0000-0002-9081-5582 Karlsruhe Institute of Technology Lippold, Holger 0000-0002-8896-7595 Eren, Ismail 0000-0003-1723-6362 Müller, Rkaya Lara Federal Institute of Technology Zurich Chekhonin, Paul 0009-0005-5029-3061 Kuc, Agnieszka Beata 0000-0002-9458-4136 Schlösser, Magnus 0000-0002-3091-8088 Karlsruhe Institute of Technology Fischer, Cornelius 0000-0003-2416-6438 Rodare 2025 structural defects graphene beta irradiation tritium tritium adsorption 2025-06-02 en https://rodare.hzdr.de/record/3734 https://www.hzdr.de/publications/Publ-41410 https://www.hzdr.de/publications/Publ-42264 10.14278/rodare.3733 https://rodare.hzdr.de/communities/rodare 1 Closed Access <p>Potential structural modifications of graphene exposed to gaseous tritium are important for membrane-based hydrogen isotope separation. Such modifications cannot be explained by electron irradiation alone. Instead, tritiation, caused by the tritium radicals remaining after the decay, is the primary effect causing the modification of the graphene surface, as confirmed by confocal Raman spectroscopy. The effect of the interaction of tritium atoms with the graphene surface exceeds that of electron irradiation at the average energy of the beta particles (5.7 keV). Compared to previously investigated high electron doses in the absence of tritium, remarkably low concentrations of tritium already induce a significant amount of sp3- and vacancy-type defects at short exposure times. Our findings are supported by molecular dynamics simulations of graphene bombardment with tritium atoms. As a consequence, tritium saturation of graphene may alter its permeability for hydrogen isotopes, thus affecting potential applications.</p>