2018
DOI: 10.1021/acsnano.8b00869
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Enhancing the Strength of Graphene by a Denser Grain Boundary

Abstract: From a device application point of view, the extreme mechanical strength of graphene is highly desirable. However, the unavoidable polycrystalline nature of graphene films produced by chemical vapor deposition (CVD) leads to significant fluctuations in mechanical properties. Although the effects of atomic defects or grain boundaries (GBs) on mechanical strength have been widely studied and some modifications have been applied to enhance the stiffness of graphene, the problems of fragility as well as significan… Show more

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Cited by 46 publications
(54 citation statements)
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“…1c) [29][30][31][32] . Considering the theoretical strength of pristine graphene monolayer is~120 GPa 33 , high-quality monolayer graphene membrane without linear defects will remain intact during drying (Fig. 1b, c, Supplementary Fig.…”
Section: Resultsmentioning
confidence: 99%
“…1c) [29][30][31][32] . Considering the theoretical strength of pristine graphene monolayer is~120 GPa 33 , high-quality monolayer graphene membrane without linear defects will remain intact during drying (Fig. 1b, c, Supplementary Fig.…”
Section: Resultsmentioning
confidence: 99%
“…But on the other hand, the electronic (e.g., bandgap), physical, chemical (e.g., catalytic activity), and mechanical properties (e.g., Young's modulus and strength) of the graphene film can be modulated by controlling the density, dimensions, and distributions of GBs. [ 16–19 ] Although GB engineering is undoubtedly an interesting topic to discussed separately, it is beyond the scope of this article.…”
Section: Introductionmentioning
confidence: 99%
“…[18][19][20][21] This includes the use of atomic force microscope (AFM)-based nanoindentation and the instrumented nanoindentation techniques. 22 Thus far, studies have concentrated on either the ultra-stiff nanosheets, graphene (Young's modulus, E $ 1 TPa) 20,[23][24][25] and boron nitride (E $ 250 GPa) in particular, 17,26 or the very so biological samples such as protein nanosheets. 27 Although there are a few experiments performed on nanosheets with stiffness lying in the range of a few gigapascals to tens of gigapascals, such as the dense 2-D hybrid framework of Mn 2,2-dimethylsuccinate nanosheets (E ¼ 9.4-20.9 GPa depending on crystal orientation due to anisotropy) 28 and the bismuth telluride nanosheets (E ¼ 11.7-25.7 GPa), 29 very few studies have systematically explored the mechanical behavior of nanoporous MOF nanosheets.…”
Section: Introductionmentioning
confidence: 99%