Atomic scale periodic ripples that extend for several nanometers on the surface of adjacent graphitic grains have been observed for the first time on highly ordered pyrolitic graphite by UHV-STM. The ripples emanate from a grain boundary, and are explained in terms of a mechanical deformation due to the elastic strain accumulated along the GB, which is relieved out-of-plane in the topmost graphene layer. We present a molecular dynamics model that accounts for the formation of similar ripples as result of the lattice mismatch induced by two different grain orientations. (C) 2013 Elsevier Ltd. All rights reserved.
Graphene ripples generated by grain boundaries in highly ordered pyrolytic graphite / Capasso, A.; Placidi, E.; Zhan, H. F.; Perfetto, E.; Bell, J. M.; Gu, Y. T.; Motta, N.. - In: CARBON. - ISSN 0008-6223. - 68:(2014), pp. 330-336. [10.1016/j.carbon.2013.11.009]
Graphene ripples generated by grain boundaries in highly ordered pyrolytic graphite
Placidi E.Secondo
Supervision
;
2014
Abstract
Atomic scale periodic ripples that extend for several nanometers on the surface of adjacent graphitic grains have been observed for the first time on highly ordered pyrolitic graphite by UHV-STM. The ripples emanate from a grain boundary, and are explained in terms of a mechanical deformation due to the elastic strain accumulated along the GB, which is relieved out-of-plane in the topmost graphene layer. We present a molecular dynamics model that accounts for the formation of similar ripples as result of the lattice mismatch induced by two different grain orientations. (C) 2013 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
