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- W2149092818 abstract "Dislocations, one of the key entities in materials science, govern the properties of any crystalline material. Thus, understanding their life cycle, from creation to annihilation via motion and interaction with other dislocations, point defects and surfaces, is of fundamental importance. Unfortunately, atomic-scale investigations of dislocation evolution in a bulk object are well beyond the spatial and temporal resolution limits of current characterization techniques. Here we overcome the experimental limits by investigating the two-dimensional graphene in an aberration-corrected transmission electron microscope, exploiting the impinging energetic electrons both to image and stimulate atomic-scale morphological changes in the material. The resulting transformations are followed in situ, atom-by-atom, showing the full life cycle of a dislocation from birth to annihilation. Our experiments, combined with atomistic simulations, reveal the evolution of dislocations in two-dimensional systems to be governed by markedly long-ranging out-of-plane buckling. Dislocations are key in determining a variety of properties of crystalline materials, but are inherently difficult to study in three-dimensional structures. Here, Lehtinen et al. image the full life cycle of a dislocation in a two-dimensional graphene sheet, from birth to annihilation." @default.
- W2149092818 created "2016-06-24" @default.
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- W2149092818 date "2013-06-28" @default.
- W2149092818 modified "2023-10-16" @default.
- W2149092818 title "Atomic scale study of the life cycle of a dislocation in graphene from birth to annihilation" @default.
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- W2149092818 doi "https://doi.org/10.1038/ncomms3098" @default.
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