期刊
2D MATERIALS
卷 8, 期 4, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/2053-1583/ac28ab
关键词
carbon allotropes; substitutional oxygen; graphene; oxygen implantation; doping; electronic properties
资金
- Danish National Research Foundation [DNRF103]
- EU Graphene Flagship Core 2 [785219]
- EU Graphene Flagship Core 3 [785219]
- Villum Young Investigator Program [19130]
- 'Programma per Giovani Ricercatori'-Rita Levi Montalcini 2017
- NAS of Ukraine [0120U102265]
- Provincial Council of Gipuzkoa [2021-CIEN-000070-01]
- Basque Department of Education [PIBA-2020-1-0014]
- Vinnova [201902878]
- Spanish Ministry of Science and Innovation [PID2019-107338RB-C66]
- European Union (EU) through Horizon 2020 (FET-Open project SPRING Grant) [863098]
- MICINN Ramon y Cajal program [RYC2019-028443-I]
Different binding of oxygen to graphene results in abrupt changes in its electronic properties, affecting its doping status and causing an asymmetry in electron and hole conduction. The findings offer essential insights into the impact of oxygen in carbon nanomaterials and their wide range of applications.
We show abrupt changes in the electronic properties of graphene with different types of binding to oxygen. Whereas oxygen bonded to the basal plane in the form of functional groups p-type dopes graphene, we prove that substitutional (i.e. in-plane) oxygen n-type dopes it. Moreover, we determine that impurity scattering potentials introduced by these substitutional atoms are notably larger than those of conventional donors, e.g. nitrogen. Both facts ultimately result in a conduction asymmetry in the system with holes being scattered more strongly than electrons. These findings provide essential insights into the impact of oxygen in carbon nanomaterials such as graphene oxide, oxidized carbon nanotubes or novel two-dimensional pi-conjugated organic frameworks, promising compounds for a wide range of applications including flexible electronics, catalysis, energy storage or biomedicine.
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