Deutsch
 
Hilfe Datenschutzhinweis Impressum
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT
  A Silica Bilayer Supported on Ru(0001): Following the Crystalline-to Vitreous Transformation in Real Time with Spectro‐Microscopy

Klemm, H., Prieto, M., Xiong, F., Hassine, G. B., Heyde, M., Menzel, D., et al. (2020). A Silica Bilayer Supported on Ru(0001): Following the Crystalline-to Vitreous Transformation in Real Time with Spectro‐Microscopy. Angewandte Chemie, 132(26), 10674-10680. doi:10.1002/ange.202002514.

Item is

Basisdaten

einblenden: ausblenden:
Genre: Zeitschriftenartikel

Dateien

einblenden: Dateien
ausblenden: Dateien
:
ange.202002514.pdf (Verlagsversion), 4MB
Name:
ange.202002514.pdf
Beschreibung:
-
OA-Status:
Hybrid
Sichtbarkeit:
Öffentlich
MIME-Typ / Prüfsumme:
application/pdf / [MD5]
Technische Metadaten:
Copyright Datum:
2020
Copyright Info:
The Author(s)

Externe Referenzen

einblenden:

Urheber

einblenden:
ausblenden:
 Urheber:
Klemm, Hagen1, Autor           
Prieto, Mauricio1, Autor           
Xiong, Feng2, Autor
Hassine, Ghada B.3, Autor
Heyde, Markus1, Autor           
Menzel, Dietrich1, 4, Autor           
Sierka, Marek3, Autor
Schmidt, Thomas1, Autor           
Freund, Hans-Joachim1, Autor           
Affiliations:
1Chemical Physics, Fritz Haber Institute, Max Planck Society, ou_24022              
2Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, P. R. China, ou_persistent22              
3Otto-Schott-Institut für Materialforschung, Friedrich-Schiller-Universität Jena, Löbdergraben 32, D-07743 Jena, Germany, ou_persistent22              
4Physik-Department E20, Technical University München, 85748 Garching, Germany, ou_persistent22              

Inhalt

einblenden:
ausblenden:
Schlagwörter: -
 Zusammenfassung: The crystalline to vitreous phase transformation of a SiO2 bilayer supported on Ru(0001) was studied by means of time‐dependent LEED, local XPS and DFT calculations. The silica bilayer system constitutes a model system that has interesting parallels to 3D silica glass and can be used to understand the mechanism of the disorder transition. An Arrhenius analysis of the time constant for the phase transformation in the 2D hexagonal network of crystalline silica at variable temperature gives apparent activation energy values (Eaapp) of (4.2 ± 0.6) and (4.1 ± 0.2) eV for the transformation in UHV and O2 atmosphere, respectively. The differences observed in the Eaapp values lie within the experimental accuracy of the determination. DFT simulations show that the formation of a Stone‐Wales type of defect follows a complex mechanism, where the two layers show decoupled behavior in terms of chemical bond rearrangements. The calculated activation energy of the rate determining step for the formation of a Stone‐Wales type of defect of 4.3 eV is in a very good agreement with the experimental value. Charge transfer between SiO2 bilayer and Ru(0001) support is shown to lower the activation energy for breaking the Si‐O bond compared to the unsupported film. The pre‐exponential factors obtained under both atmospheres differ significantly, thus suggesting that the interfacial ORu underneath the SiO2 bilayer plays a role on how the disordering propagates within the film.

Details

einblenden:
ausblenden:
Sprache(n): eng - English
 Datum: 2020-02-182020-03-092020-03-152020-06-22
 Publikationsstatus: Erschienen
 Seiten: 7
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1002/ange.202002514
 Art des Abschluß: -

Veranstaltung

einblenden:

Entscheidung

einblenden:

Projektinformation

einblenden: ausblenden:
Projektname : CRYVISEL - Crystalline and vitreous silica films and their interconversion
Grant ID : 669179
Förderprogramm : Horizon 2020 (H2020)
Förderorganisation : European Commission (EC)

Quelle 1

einblenden:
ausblenden:
Titel: Angewandte Chemie
  Kurztitel : Angew. Chem.
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Weinheim : Wiley-VCH
Seiten: 7 Band / Heft: 132 (26) Artikelnummer: - Start- / Endseite: 10674 - 10680 Identifikator: ISSN: 0044-8249
CoNE: https://pure.mpg.de/cone/journals/resource/954926979058_1