Tsinghua University Press;Beijing: Tsinghua University Press
摘要:
摘要： Graphene has demonstrated its potential in several practical applications owing to its remarkable electronic and physical properties. In this study, we successfully fabricated a suspended graphene device with a width down to 20 nm. The morphological evolution of graphene under various electric field effects was systematically examined using an in-situ transmission electron microscope （TEM）. The hourglass-shaped graphene sample instantly broke apart at 7.5 mA, indicating an impressive breakdown current density. The current-carrying capacity was calculated to be -1.6 × 10^9 A.cm-2, which is several orders higher than that of copper. The current-carrying capacity depended on the resistivity of graphene. In addition, atomic volume changes occurred in the multilayer graphene samples due to surface diffusion and Ostwald ripening （OR）, indicating that the breakdown mechanism is well approximated by the electric field. This study not only provides a theory to explain the breakdown behavior but also presents the effects on materials contacted with a graphene layer used as the transmission path. 其他題名： Nano Res 其他題名： Nano Research 出版者： Beijing: Tsinghua University Press 出版日期： 2016-12-01 出處： Nano research, 2016-12, Vol.9 (12), p.3663-3670 版權： Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016 版權： Nano Research is a copyright of Springer, (2016). All Rights Reserved. 識別號： ISSN: 1998-0124 識別號： EISSN: 1998-0000 識別號： DOI: 10.1007/s12274-016-1237-0
