Browse

Structural evolution of graphene in air at the electrical breakdown limit

Cited 9 time in Web of Science Cited 9 time in Scopus
Authors
Son, Jangyup; Choi, Minkyung; Choi, Heechae; Kim, Sang Jin; Kim, Seungchul; Lee, Kwang-Ryeol; Vantasin, Sanpon; Tanabe, Ichiro; Cha, Jongin; Ozaki, Yukihiro; Hong, Byung Hee; Yang, In-Sang; Hong, Jongill
Issue Date
2016-04
Citation
Carbon, Vol.99, pp.466-471
Abstract
In application of graphene to real electronics, understanding the mechanism of the electrical breakdown of the graphene in harsh environments should precede many activities in tamed conditions. In this article, we report the unusual structural evolution of microbridge graphene in air near the electrical current-breakdown limit. In-situ micro-Raman study revealed that Joule heating near the electrical breakdown gave rise to a substantial structural evolution: a previously unknown broad amorphous-like and partially reversible phase at an on-and off-current of similar to 3.0 X 10(8) A/cm(2), which finally drove the phase to the electrical current-breakdown. Our calculations suggest that the phase originates from the broken symmetry caused by defect formations during Joule heating. In particular, these formations are bonds of carbon-oxygen and vacancies-oxygen. A collection of energetically favorable vacancies-oxygen pairs results in porous graphene, and its evolution can be the key to understanding how the breakdown starts and propagates in graphene under high current density in air. (C) 2015 Elsevier Ltd. All rights reserved.
ISSN
0008-6223
URI
https://hdl.handle.net/10371/172175
DOI
https://doi.org/10.1016/j.carbon.2015.11.075
Files in This Item:
There are no files associated with this item.
Appears in Collections:
College of Natural Sciences (자연과학대학)Dept. of Chemistry (화학부)Journal Papers (저널논문_화학부)
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse