Raman spectroscopic characterizations of graphene on oxide substrates for remote epitaxy
Abstract
Graphene layers placed on SrTiO3 single-crystal substrates, i.e., templates for remote epitaxy of functional oxide membranes, were investigated using temperature-dependent confocal Raman spectroscopy. This approach successfully resolved distinct Raman modes of graphene that are often untraceable in conventional measurements with non-confocal optics due to the strong Raman scattering background of SrTiO3. Information on defects and strain states was obtained for a few graphene/SrTiO3 samples that were synthesized by different techniques. This confocal Raman spectroscopic approach can shed light on the investigation of not only this graphene/SrTiO3 system but also various two-dimensional layered materials whose Raman modes interfere with their substrates.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 08, 2023
- Source ID
- 10.1063/5.0143083
Entities
People
- Celesta S. Chang
- D. Y. Kim
- Jeehwan Kim
- Matteo Minola
- N. L. Kothalawala
- Sangho Lee
- Sujan Shrestha
- Sung Seok A Seo
Organizations
- Air Force Research Laboratory
- Division of Materials Research
- Massachusetts Institute of Technology
- Max Planck Society
- Southern Company
- University of Kentucky