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Ruoff, Rodney S.
Center for Multidimensional Carbon Materials (CMCM)
Research Interests
  • Next generation carbons, ultrathin sp3-bonded carbon sheets, negative curvature (‘Schwartzites’) carbons, sp3/sp2 hybrid carbon materials, model compounds for novel carbon materials, reaction mechanisms

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Ultrahigh Strength and Modulus Graphene-Based Hybrid Carbons with AB-Stacked and Turbostratic Structures

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Title
Ultrahigh Strength and Modulus Graphene-Based Hybrid Carbons with AB-Stacked and Turbostratic Structures
Author
Jin, SunghwanChung, BongjinPark, Hyo JuCunning, Benjamin V.Lee, Jae-HyeokYoon, AramHuang, MingSeo, HojinLee, DongjuLee, ZonghoonRuoff, Rodney S.Ryu, Seongwoo
Issue Date
2020-09
Publisher
WILEY-V C H VERLAG GMBH
Citation
ADVANCED FUNCTIONAL MATERIALS
Abstract
Graphene-based hybrid carbons composed of a mix of AB-stacked and turbostratic regions are reported. Macroscopic graphene films consisting of stacked graphenes are prepared using a liquid crystal graphene oxide dispersion. The graphene films are then infiltrated with bioinspired adhesives, catecholamines, and polymerized to obtain graphene/poly(catecholamine) composites. After heat treatment up to 3000 oC, the composite films are transformed to have both AB-stacked (mainly from graphene oxide) and turbostratic (mainly from poly(catecholamines)) structures, and exhibit significantly improved mechanical properties compared to the films having a predominant AB-stacked structure made from only graphene oxide. They have almost twice the fracture strength (1012 +/- 146 MPa) and approximate to 1.5x increase of both Young's modulus (21.87 +/- 2.24 GPa) and strain-to-failure (8.91 +/- 0.50%). In addition, the films have an in-plane electrical conductivity as high as 1320 +/- 159 S cm(-1). Such hybrid-carbon films with the indicated mechanical and electrical properties have many promising uses, such as for light-weight structural materials, and in flexible electronics such as for wearable heaters or in sensing electrodes.
URI
https://scholarworks.unist.ac.kr/handle/201301/48308
URL
https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202005381
DOI
10.1002/adfm.202005381
ISSN
1616-301X
Appears in Collections:
CHM_Journal Papers
MSE_Journal Papers
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