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  Spectroscopic evidence for a gold-coloured metallic water solution

Mason, P. E., Schewe, H. C., Buttersack, T., Kostal, V., Vitek, M., McMullen, R. S., et al. (2021). Spectroscopic evidence for a gold-coloured metallic water solution. Nature, 595(7869), 673-676. doi:10.1038/s41586-021-03646-5.

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 Urheber:
Mason, Philip E.1, Autor
Schewe, Hanns Christian1, 2, Autor           
Buttersack, Tillmann1, 2, 3, Autor           
Kostal, Vojtech1, Autor
Vitek, Marco1, Autor
McMullen, Ryan S.3, Autor
Ali, Hebatallah2, 4, Autor           
Trinter, Florian2, 5, 6, Autor           
Lee, Chin2, 7, 8, Autor           
Neumark, Daniel M.7, 8, Autor
Thürmer, Stephan9, Autor
Seidel, Robert10, 11, Autor
Winter, Bernd2, Autor           
Bradforth, Stephen E.3, Autor
Jungwirth, Pavel1, Autor
Affiliations:
1Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Prague, Czech Republic, ou_persistent22              
2Molecular Physics, Fritz Haber Institute, Max Planck Society, ou_634545              
3Department of Chemistry, University of Southern California, Los Angeles, CA, USA, ou_persistent22              
4Department of Physics, Faculty of Women for Art, Science and Education, Ain Shams University, Cairo, Egypt, ou_persistent22              
5Photon Science, Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany, ou_persistent22              
6Institut für Kernphysik, Goethe-Universität Frankfurt, Frankfurt am Main, Germany, ou_persistent22              
7Department of Chemistry, University of California, Berkeley, CA, United States, ou_persistent22              
8Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States, ou_persistent22              
9Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto, Japan, ou_persistent22              
10Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin, Germany, ou_persistent22              
11Department of Chemistry, Humboldt-Universität zu Berlin, Berlin, Germany, ou_persistent22              

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 Zusammenfassung: Insulating materials can in principle be made metallic by applying pressure. In the case of pure water, this is estimated1 to require a pressure of 48 megabar, which is beyond current experimental capabilities and may only exist in the interior of large planets or stars2–4. Indeed, recent estimates and experiments indicate that water at pressures accessible in the laboratory will at best be superionic with high protonic conductivity5, but not metallic with conductive electrons1. Here we show that a metallic water solution can be prepared by massive doping with electrons upon reacting water with alkali metals. Although analogous metallic solutions of liquid ammonia with high concentrations of solvated electrons have long been known and characterized6–9, the explosive interaction between alkali metals and water10,11 has so far only permitted the preparation of aqueous solutions with low, submetallic electron concentrations12–14. We found that the explosive behaviour of the water–alkali metal reaction can be suppressed by adsorbing water vapour at a low pressure of about 10−4 millibar onto liquid sodium–potassium alloy drops ejected into a vacuum chamber. This set-up leads to the formation of a transient gold-coloured layer of a metallic water solution covering the metal alloy drops. The metallic character of this layer, doped with around 5 × 1021 electrons per cubic centimetre, is confirmed using optical reflection and synchrotron X-ray photoelectron spectroscopies.

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Sprache(n): eng - English
 Datum: 2020-10-072021-05-142021-07-282021-07-29
 Publikationsstatus: Erschienen
 Seiten: 4
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1038/s41586-021-03646-5
 Art des Abschluß: -

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Titel: Nature
  Kurztitel : Nature
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: 4 Band / Heft: 595 (7869) Artikelnummer: - Start- / Endseite: 673 - 676 Identifikator: ISSN: 0028-0836
CoNE: https://pure.mpg.de/cone/journals/resource/954925427238