Diamond formation kinetics in shock-compressed C─H─O samples recorded by small-angle x-ray scattering and x-ray diffraction
He Z, Rödel M, Lütgert J, Bergermann A, Bethkenhagen M, Chekrygina D, Cowan TE, Descamps A, French M, Galtier E, Gleason AE, Glenn GD, Glenzer SH, Inubushi Y, Hartley NJ, Hernandez JA, Heuser B, Humphries OS, Kamimura N, Katagiri K, Khaghani D, Lee HJ, McBride EE, Miyanishi K, Nagler B, Ofori-Okai B, Ozaki N, Pandolfi S, Qu C, Ranjan D, Redmer R, Schönwälder C, Schuster AK, Stevenson MG, Sueda K, Togashi T, Vinci T, Voigt K, Vorberger J, Yabashi M, Yabuuchi T, Zinta LM, Ravasio A, Kraus D (2022)
Publication Type: Journal article
Publication year: 2022
Journal
Book Volume: 8
Pages Range: eabo0617-
Journal Issue: 35
Abstract
Extreme conditions inside ice giants such as Uranus and Neptune can result in peculiar chemistry and structural transitions, e.g., the precipitation of diamonds or superionic water, as so far experimentally observed only for pure C─H and H2O systems, respectively. Here, we investigate a stoichiometric mixture of C and H2O by shock-compressing polyethylene terephthalate (PET) plastics and performing in situ x-ray probing. We observe diamond formation at pressures between 72 ± 7 and 125 ± 13 GPa at temperatures ranging from ~3500 to ~6000 K. Combining x-ray diffraction and small-angle x-ray scattering, we access the kinetics of this exotic reaction. The observed demixing of C and H2O suggests that diamond precipitation inside the ice giants is enhanced by oxygen, which can lead to isolated water and thus the formation of superionic structures relevant to the planets' magnetic fields. Moreover, our measurements indicate a way of producing nanodiamonds by simple laser-driven shock compression of cheap PET plastics.
Authors with CRIS profile
Involved external institutions
Stanford National Accelerator Laboratory (SLAC)
United States (USA) (US)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
Universität Rostock
Germany (DE)
Japan Synchrotron Radiation Research Institute (JASRI)
Japan (JP)
École normale supérieure de Lyon (ENS)
France (FR)
Osaka University
Japan (JP)
Sorbonne Université
France (FR)
University of Oslo
Norway (NO)
United States (USA) (US)
Helmholtz-Zentrum Dresden-Rossendorf (HZDR)
Germany (DE)
Universität Rostock
Germany (DE)
Japan Synchrotron Radiation Research Institute (JASRI)
Japan (JP)
École normale supérieure de Lyon (ENS)
France (FR)
Osaka University
Japan (JP)
Sorbonne Université
France (FR)
University of Oslo
Norway (NO)
How to cite
APA:
He, Z., Rödel, M., Lütgert, J., Bergermann, A., Bethkenhagen, M., Chekrygina, D.,... Kraus, D. (2022). Diamond formation kinetics in shock-compressed C─H─O samples recorded by small-angle x-ray scattering and x-ray diffraction. Science Advances, 8(35), eabo0617-. https://dx.doi.org/10.1126/sciadv.abo0617
MLA:
He, Zhiyu, et al. "Diamond formation kinetics in shock-compressed C─H─O samples recorded by small-angle x-ray scattering and x-ray diffraction." Science Advances 8.35 (2022): eabo0617-.
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