Journal
SCIENCE
Volume 349, Issue 6252, Pages 1083-1087Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaa6502
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Funding
- U.S. National Science Foundation [DMR 1151028, CMMI 1463083]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1463083] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1151028] Funding Source: National Science Foundation
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Graphene, a single layer of carbon atoms bonded in a hexagonal lattice, is the thinnest, strongest, and stiffest known material and an excellent conductor of heat and electricity. However, these superior properties have yet to be realized for graphene-derived macroscopic structures such as graphene fibers. We report the fabrication of graphene fibers with high thermal and electrical conductivity and enhanced mechanical strength. The inner fiber structure consists of large-sized graphene sheets forming a highly ordered arrangement intercalated with small-sized graphene sheets filling the space and microvoids. The graphene fibers exhibit a submicrometer crystallite domain size through high-temperature treatment, achieving an enhanced thermal conductivity up to 1290 watts per meter per kelvin. The tensile strength of the graphene fiber reaches 1080 megapascals.
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