論文

査読有り
2017年7月1日

Uniaxial fracture test of freestanding pristine graphene using in situ tensile tester under scanning electron microscope

Extreme Mechanics Letters
  • Bongkyun Jang
  • ,
  • Alexander E. Mag-isa
  • ,
  • Jae-Hyun Kim
  • ,
  • Byungwoon Kim
  • ,
  • Hak-Joo Lee
  • ,
  • Chung-Seog Oh
  • ,
  • Takashi Sumigawa
  • ,
  • Takayuki Kitamura

14
開始ページ
10
終了ページ
15
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.eml.2016.11.001
出版者・発行元
Elsevier Ltd

Due to the atomistic thinness of graphene, it is non-trivial to measure fracture behaviors of freestanding graphene without any underlying materials. In this study, we present a methodology for measuring the fracture behavior of freestanding natural graphene with single crystallinity using an in situ tensile tester under a scanning electron microscope. A pre-crack was introduced in a freestanding graphene specimen using focused ion beam. Crystallographic information, geometric dimensions, and layer numbers of the graphene specimen were characterized before fracture testing using transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy. Taking the advantages of the in situ fracture test, we measured load–displacement data of single-crystalline bilayer graphene and observed an exciting fracture behavior during the crack extension along its zig-zag direction. Young's modulus and the stress field of the specimen at the moment of fracture were evaluated from the measured data and finite element analysis. The present study provides a direct pathway to fracture mechanics tests of natural graphene under uniaxial tension, and could be an insightful cornerstone for fracture mechanics tests of other two-dimensional materials or atomically thin film.

リンク情報
DOI
https://doi.org/10.1016/j.eml.2016.11.001
ID情報
  • DOI : 10.1016/j.eml.2016.11.001
  • ISSN : 2352-4316
  • SCOPUS ID : 85006699813

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