Nucleation of graphene layers on magnetic oxides: Co3O4(111) and Cr2O3(0001) from theory and experiment
Abstract
We report directly grown strongly adherent graphene on Co3O4(111) by carbon molecular beam epitaxy (C MBE) at 850 K and density functional theory (DFT) findings that the first graphene layer is reconstructed to fit the Co3O4 surface, while subsequent layers retain normal graphene structure. This adherence to the Co3O4 structure results from partial bonding of half the carbons to top oxygens of the substrate. This structure is validated by X-ray photoelectron spectroscopy and low-energy electron diffraction studies, showing layer-by-layer graphene growth with ~0.08 electrons/carbon atom transferred to the oxide from the first graphene layer, in agreement with DFT. In contrast, for Cr2O3 DFT finds no strong bonding to the surface and C MBE on Cr2O3(0001) yields only graphite formation at 700 K, with C desorption above 800 K. As a result, strong graphene-to-oxide charge transfer aids nucleation of graphene on incommensurate oxide substrates and may have implications for spintronics.
- Authors:
-
- Univ. of North Texas, Denton, TX (United States)
- California Inst. of Technology (CalTech), Pasadena, CA (United States)
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Org.:
- USDOE; National Science Foundation (NSF)
- OSTI Identifier:
- 1347748
- Grant/Contract Number:
- SC0014607; ECCS-1508991; DMR-1436985
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physical Chemistry Letters
- Additional Journal Information:
- Journal Volume: 8; Journal Issue: 1; Journal ID: ISSN 1948-7185
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Beatty, John, Cheng, Tao, Cao, Yuan, Driver, M. Sky, Goddard, III, William A., and Kelber, Jeffry A. Nucleation of graphene layers on magnetic oxides: Co3O4(111) and Cr2O3(0001) from theory and experiment. United States: N. p., 2016.
Web. doi:10.1021/acs.jpclett.6b02325.
Beatty, John, Cheng, Tao, Cao, Yuan, Driver, M. Sky, Goddard, III, William A., & Kelber, Jeffry A. Nucleation of graphene layers on magnetic oxides: Co3O4(111) and Cr2O3(0001) from theory and experiment. United States. https://doi.org/10.1021/acs.jpclett.6b02325
Beatty, John, Cheng, Tao, Cao, Yuan, Driver, M. Sky, Goddard, III, William A., and Kelber, Jeffry A. Wed .
"Nucleation of graphene layers on magnetic oxides: Co3O4(111) and Cr2O3(0001) from theory and experiment". United States. https://doi.org/10.1021/acs.jpclett.6b02325. https://www.osti.gov/servlets/purl/1347748.
@article{osti_1347748,
title = {Nucleation of graphene layers on magnetic oxides: Co3O4(111) and Cr2O3(0001) from theory and experiment},
author = {Beatty, John and Cheng, Tao and Cao, Yuan and Driver, M. Sky and Goddard, III, William A. and Kelber, Jeffry A.},
abstractNote = {We report directly grown strongly adherent graphene on Co3O4(111) by carbon molecular beam epitaxy (C MBE) at 850 K and density functional theory (DFT) findings that the first graphene layer is reconstructed to fit the Co3O4 surface, while subsequent layers retain normal graphene structure. This adherence to the Co3O4 structure results from partial bonding of half the carbons to top oxygens of the substrate. This structure is validated by X-ray photoelectron spectroscopy and low-energy electron diffraction studies, showing layer-by-layer graphene growth with ~0.08 electrons/carbon atom transferred to the oxide from the first graphene layer, in agreement with DFT. In contrast, for Cr2O3 DFT finds no strong bonding to the surface and C MBE on Cr2O3(0001) yields only graphite formation at 700 K, with C desorption above 800 K. As a result, strong graphene-to-oxide charge transfer aids nucleation of graphene on incommensurate oxide substrates and may have implications for spintronics.},
doi = {10.1021/acs.jpclett.6b02325},
journal = {Journal of Physical Chemistry Letters},
number = 1,
volume = 8,
place = {United States},
year = {Wed Dec 14 00:00:00 EST 2016},
month = {Wed Dec 14 00:00:00 EST 2016}
}
Web of Science
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