Structural evolution of graphene in air at the electrical breakdown limit

Jangyup Son, Minkyung Choi, Heechae Choi, Sang Jin Kim, Seungchul Kim, Kwang Ryeol Lee, Sanpon Vantasin, Ichiro Tanabe, Jongin Cha, Yukihiro Ozaki, Byung Hee Hong, In Sang Yang, Jongill Hong

Research output: Contribution to journalArticle

7 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)466-471
Number of pages6
JournalCarbon
Volume99
DOIs
Publication statusPublished - 2016 Apr 1

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Graphite
Graphene
Air
Joule heating
Oxygen vacancies
Current density
Electronic equipment
Carbon
Oxygen
Defects

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)

Cite this

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. / Structural evolution of graphene in air at the electrical breakdown limit. In: Carbon. 2016 ; Vol. 99. pp. 466-471.
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Son, J, Choi, M, Choi, H, Kim, SJ, Kim, S, Lee, KR, Vantasin, S, Tanabe, I, Cha, J, Ozaki, Y, Hong, BH, Yang, IS & Hong, J 2016, 'Structural evolution of graphene in air at the electrical breakdown limit', Carbon, vol. 99, pp. 466-471. https://doi.org/10.1016/j.carbon.2015.11.075

Structural evolution of graphene in air at the electrical breakdown limit. / 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.

In: Carbon, Vol. 99, 01.04.2016, p. 466-471.

Research output: Contribution to journalArticle

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