Reactive intercalation and oxidation at the buried graphene-germanium interface
Source abstract
Abstract
We explore a number of different electrochemical, wet chemical, and gas phase approaches to study intercalation and oxidation at the buried graphene-Ge interface. While the previous literature focused on the passivation of the Ge surface by chemical vapor deposited graphene, we show that particularly via electrochemical intercalation in a 0.25 N solution of anhydrous sodium acetate in glacial acetic acid, this passivation can be overcome to grow GeO2 under graphene. Angle resolved photoemission spectroscopy, Raman spectroscopy, He ion microscopy, and time-of-flight secondary ion mass spectrometry show that the monolayer graphene remains undamaged and its intrinsic strain is released by the interface oxidation. Graphene acts as a protection layer for the as-grown Ge oxide, and we discuss how these insights can be utilized for new processing approaches.
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Research context
OpenAlex topics: Graphene research and applications · Semiconductor materials and devices · 2D Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Engineering, University of Cambridge 1 , Cambridge CB3 0FA, United Kingdom
The University of Manchester at Harwell, Diamond Light Source, Harwell Campus 2 , Didcot OX11 0DE, United Kingdom
School of Chemistry, University of Manchester 3 , Oxford Road, Manchester M13 9PL, United Kingdom
Diamond Light Source 4 , Didcot OX11 0DE, United Kingdom
National Physical Laboratory 5 , Hampton Rd, Teddington, Middlesex TW11 0LW, United Kingdom
Faculty of Physics, University of Vienna 6 , Boltzmanngasse 5, A-1090 Vienna, Austria
Institute of Materials Chemistry, Vienna University of Technology (TU Wien) 7 , Getreidemarkt 9/165, A-1060 Vienna, Austria
National EPSRC XPS Users’ Service (NEXUS), School of Mechanical and Systems Engineering, Newcastle University 8 , Newcastle Upon Tyne NE1 7RU, United Kingdom
Funding
H2020 Marie Skłodowska-Curie Actions · Diamond Light Source · Engineering and Physical Sciences Research Council
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