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Ultrahard bulk amorphous carbon from collapsed fullerene

Shang, Yuchen (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Liu, Zhaodong (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China; Synergetic Extreme Condition User Facility, Jilin University, Changchun, China
Dong, Jiajun (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
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Yao, Mingguang (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Yang, Zhenxing (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Li, Quanjun (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Zhai, Chunguang (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Shen, Fangren (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Hou, Xuyuan (författare)
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Wang, Lin (författare)
Earth and Planets Laboratory, Carnegie Institution for Science, DC, Washington, United States; Bayerisches Geoinstitut, University of Bayreuth, Bayreuth, Germany
Zhang, Nianqiang (författare)
Key Laboratory of Structures Dynamic Behavior and Control of Ministry of Education, Harbin Institute of Technology, Harbin, China
Zhang, Wei (författare)
Key Laboratory of Automobile Materials MOE, School of Materials Science and Engineering, Electron Microscopy Center, and International Center of Future Science, Jilin University, Changchun, China
Fu, Rong (författare)
School of Materials Science and Engineering, State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai, China
Ji, Jianfeng (författare)
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China
Zhang, Xingmin (författare)
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China
Lin, He (författare)
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, China
Fei, Yingwei (författare)
Earth and Planets Laboratory, Carnegie Institution for Science, DC, Washington, United States
Sundqvist, Bertil (författare)
Umeå universitet,Institutionen för fysik,State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun, China
Wang, Weihua (författare)
Institute of Physics, Chinese Academy of Sciences, Beijing, China
Liu, Bingbing (författare)
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)
2021-11-24
2021
Engelska.
Ingår i: Nature. - : Nature Publishing Group. - 0028-0836 .- 1476-4687. ; 599:7886, s. 599-604
Relaterad länk:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Amorphous materials inherit short- and medium-range order from the corresponding crystal and thus preserve some of its properties while still exhibiting novel properties1,2. Due to its important applications in technology, amorphous carbon with sp2 or mixed sp2–sp3 hybridization has been explored and prepared3,4, but synthesis of bulk amorphous carbon with sp3 concentration close to 100% remains a challenge. Such materials inherit the short-/medium-range order of diamond and should also inherit its superior properties5. Here, we successfully synthesized millimetre-sized samples—with volumes 103–104 times as large as produced in earlier studies—of transparent, nearly pure sp3 amorphous carbon by heating fullerenes at pressures close to the cage collapse boundary. The material synthesized consists of many randomly oriented clusters with diamond-like short-/medium-range order and possesses the highest hardness (101.9 ± 2.3 GPa), elastic modulus (1,182 ± 40 GPa) and thermal conductivity (26.0 ± 1.3 W m−1 K−1) observed in any known amorphous material. It also exhibits optical bandgaps tunable from 1.85 eV to 2.79 eV. These discoveries contribute to our knowledge about advanced amorphous materials and the synthesis of bulk amorphous materials by high-pressure and high-temperature techniques and may enable new applications for amorphous solids.

Ämnesord

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

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