NL repository
menu
검색
Library
Browse
Communities & Collections
By Date
Authors
Titles
Subject
My Repository
My Account
Receive email updates
Edit Profile
DSpace at EWHA
자연과학대학
물리학전공
Journal papers
View : 504 Download: 0
Structural evolution of graphene in air at the electrical breakdown limit
Title
Structural evolution of graphene in air at the electrical breakdown limit
Authors
Son J.
;
Choi M.
;
Choi H.
;
Kim S.J.
;
Kim S.
;
Lee K.-R.
;
Vantasin S.
;
Tanabe I.
;
Cha J.
;
Ozaki Y.
;
Hong B.H.
;
Yang I.-S.
;
Hong J.
Ewha Authors
양인상
SCOPUS Author ID
양인상
Issue Date
2016
Journal Title
Carbon
ISSN
0008-6223
Citation
Carbon vol. 99, pp. 466 - 471
Publisher
Elsevier Ltd
Indexed
SCI; SCIE; SCOPUS
Document Type
Article
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 ∼3.0 × 108 A/cm2, 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. © 2015 Elsevier Ltd. All rights reserved.
DOI
10.1016/j.carbon.2015.11.075
Appears in Collections:
자연과학대학
>
물리학전공
>
Journal papers
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML
Show full item record
Find@EWHA
트윗하기
BROWSE
Communities & Collections
By Date
Authors
Titles
Subject