From Crystalline to Amorphous Germania Bilayer Films at the Atomic Scale: Preparation and Characterization

A new two‐dimensional (2D) germanium dioxide film has been prepared. The film consists of interconnected germania tetrahedral units forming a bilayer structure, weakly coupled to the supporting Pt(111) metal‐substrate. Density functional theory calculations predict a stable structure of 558‐membered...

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Detalles Bibliográficos
Autores principales: Lewandowski, Adrián L., Tosoni, Sergio, Gura, Leonard, Schlexer, Philomena, Marschalik, Patrik, Schneider, Wolf‐Dieter, Heyde, Markus, Pacchioni, Gianfranco, Freund, Hans‐Joachim
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6771709/
https://www.ncbi.nlm.nih.gov/pubmed/31050096
http://dx.doi.org/10.1002/anie.201903922
Descripción
Sumario:A new two‐dimensional (2D) germanium dioxide film has been prepared. The film consists of interconnected germania tetrahedral units forming a bilayer structure, weakly coupled to the supporting Pt(111) metal‐substrate. Density functional theory calculations predict a stable structure of 558‐membered rings for germania films, while for silica films 6‐membered rings are preferred. By varying the preparation conditions the degree of order in the germania films is tuned. Crystalline, intermediate ordered and purely amorphous film structures are resolved by analysing scanning tunnelling microscopy images.

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