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Enhancement of short/medium-range order and thermal conductivity in ultrahard sp3 amorphous carbon by C70 precursor

Shang, Yuchen (author)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Yao, Mingguang (author)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Liu, Zhaodong (author)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China; Synergetic Extreme Condition User Facility, Jilin University, Changchun, China
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Fu, Rong (author)
School of Materials Science and Engineering, State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai, China; School of Mathematical and Physical Sciences, University of Technology Sydney, NSW, Australia
Yan, Longbiao (author)
Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China
Yang, Long (author)
School of Materials Science and Engineering, Tongji University, Shanghai, China
Zhang, Zhongyin (author)
School of Energy and Power Engineering, Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, China
Dong, Jiajun (author)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Zhai, Chunguang (author)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Hou, Xuyuan (author)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Fei, Liting (author)
Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China
Zhang, GuanJie (author)
Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China
Ji, Jianfeng (author)
Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China
Zhu, Jie (author)
School of Energy and Power Engineering, Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian, China
Lin, He (author)
Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China
Sundqvist, Bertil (author)
Umeå universitet,Institutionen för fysik
Liu, Bingbing (author)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China; Synergetic Extreme Condition User Facility, Jilin University, Changchun, China
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 (creator_code:org_t)
Springer Nature, 2023
2023
English.
In: Nature Communications. - : Springer Nature. - 2041-1723. ; 14:1
Related links:
https://doi.org/10.1...
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https://umu.diva-por... (primary) (Raw object)
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • As an advanced amorphous material, sp3 amorphous carbon exhibits exceptional mechanical, thermal and optical properties, but it cannot be synthesized by using traditional processes such as fast cooling liquid carbon and an efficient strategy to tune its structure and properties is thus lacking. Here we show that the structures and physical properties of sp3 amorphous carbon can be modified by changing the concentration of carbon pentagons and hexagons in the fullerene precursor from the topological transition point of view. A highly transparent, nearly pure sp3−hybridized bulk amorphous carbon, which inherits more hexagonal-diamond structural feature, was synthesized from C70 at high pressure and high temperature. This amorphous carbon shows more hexagonal-diamond-like clusters, stronger short/medium-range structural order, and significantly enhanced thermal conductivity (36.3 ± 2.2 W m−1 K−1) and higher hardness (109.8 ± 5.6 GPa) compared to that synthesized from C60. Our work thus provides a valid strategy to modify the microstructure of amorphous solids for desirable properties.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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