Mobility of Single Vacancies and Adatoms in Graphene at Room Temperature.

ABSTRACT: We investigate the mobility of structural defects, adatoms and defect-adatoms combination in self-supporting graphene subjected to keV ion irradiation. In a first scenario, homogeneous irradiation using 20 keV Ar⁺ ions at a dose of 3 × 10¹⁴ ions cm^-2 induces tensile strain of up to 0.8%. This strain diminishes with increasing defect density at a dose of 5 × 10¹⁴ ions cm^-2, indicating a strain-relaxation mechanism. Contrary to the expected localized behavior, vacancies exhibit long-range interactions, contributing to global strain effects across the lattice. In a second scenario, by employing a nanopore mask, we spatially confined defect generation to periodically aligned circular regions surrounded by non-irradiated material, enabling

SUBMITTER: Tran TT 

PROVIDER: S-EPMC12410897 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature