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- Title
Microstructural Characterization and Nanomechanical Properties of Multilayer Graphene on Metal Substrates.
- Authors
Bavdekar, Salil; Rudawski, Nicholas G.; Basu, Sandip; Subhash, Ghatu
- Abstract
Multilayer graphene (MLG) samples fabricated via chemical vapor deposition on Ni substrates were evaluated for their microstructure and mechanical properties and compared against those on a single-layer graphene lamella deposited on a Cu substrate. Electron microscopy shows that the deposition of MLG is not always uniform, and the number of lamellae vary from location to location. Furthermore, with the increase in number of lamellae, more defects evolved, and the layers no longer stayed parallel to the substrate surface. X-ray diffraction and Raman spectroscopy confirmed that the deposited graphene was not completely crystalline and contained amorphous regions and other defects. This nanocomposite showed an increase in nanoindentation hardness and elastic modulus at low indentation depths compared to a Ni film with no depositions. Overall, it was found that the deposited samples did not possess any graphenic qualities, but rather those of highly oriented pyrolytic graphite in the best case and turbostratic graphite in the worst case.
- Subjects
PYROLYTIC graphite; GRAPHENE; CHEMICAL vapor deposition; COPPER; METALS; RAMAN spectroscopy
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2024, Vol 76, Issue 3, p1618
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-023-06160-3