Fracture Characteristics of Monolayer CVD-Graphene

Yun Hwangbo, Choong Kwang Lee, Sang Min Kim, Jae Hyun Kim, Kwang Seop Kim, Bongkyun Jang, Hak Joo Lee, Seoung Ki Lee, Seong Su Kim, Jong Hyun Ahn, Seung Mo Lee

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Abstract

We have observed and analyzed the fracture characteristics of the monolayer CVD-graphene using pressure bulge testing setup. The monolayer CVD-graphene has appeared to undergo environmentally assisted subcritical crack growth in room condition, i.e. stress corrosion cracking arising from the adsorption of water vapor on the graphene and the subsequent chemical reactions. The crack propagation in graphene has appeared to be able to be reasonably tamed by adjusting applied humidity and stress. The fracture toughness, describing the ability of a material containing inherent flaws to resist catastrophic failure, of the CVD-graphene has turned out to be exceptionally high, as compared to other carbon based 3D materials. These results imply that the CVD-graphene could be an ideal candidate as a structural material notwithstanding environmental susceptibility. In addition, the measurements reported here suggest that specific non-continuum fracture behaviors occurring in 2D monoatomic structures can be macroscopically well visualized and characterized.

Original languageEnglish
Article number4439
JournalScientific reports
Volume4
DOIs
Publication statusPublished - 2014 Apr 1

All Science Journal Classification (ASJC) codes

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    Hwangbo, Y., Lee, C. K., Kim, S. M., Kim, J. H., Kim, K. S., Jang, B., Lee, H. J., Lee, S. K., Kim, S. S., Ahn, J. H., & Lee, S. M. (2014). Fracture Characteristics of Monolayer CVD-Graphene. Scientific reports, 4, [4439]. https://doi.org/10.1038/srep04439