Journal
ACS NANO
Volume 2, Issue 3, Pages 572-578Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn700349a
Keywords
graphene oxide; graphene oxide paper; graphite; divalent ion; cross-linking; mechanical property
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Funding
- Direct For Mathematical & Physical Scien [0844115] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [GRANTS:13632038] Funding Source: National Science Foundation
- Division Of Materials Research [0844115] Funding Source: National Science Foundation
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Significant enhancement in mechanical stiffness (10-200%) and fracture strength (similar to 50%) of graphene oxide paper, a novel paperlike material made from individual graphene oxide sheets, can be achieved upon modification with a small amount (less than 1 wt %) of Mg2+ and Ca2+. These results (an be readily rationalized in terms of the chemical interactions between the functional groups of the graphene oxide sheets and the divalent metals ions. While oxygen functional groups on the basal planes of the sheets and the carboxylate groups on the edges can both bond to Mg2+ and Ca2+, the main contribution to mechanical enhancement of the paper comes from the latter.
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