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Title: Controllable healing of defects and nitrogen doping of graphene by CO and NO molecules

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics

Controllable defect healing and N-doping in graphene would be very valuable for potential device applications. Here we report first-principles molecular-dynamics simulations that suggest a procedure with fast dynamics and low thermal budget. Vacancies can be healed by sequential exposure to CO and NO molecules. A CO molecule gets adsorbed at a vacancy site and a NO molecule subsequently removes the extra O by forming NO2. Controllable N-doping can be achieved by sequential vacancy creation (e.g., by an electron beam) and subsequent exposure to NO molecules at room temperature. A combination of CO and NO molecules can potentially provide simultaneous healing and doping at a desirable ratio. The proposed strategy introduces no extra defects and is promising for graphene-based materials in radiation environments.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC)
OSTI ID:
1564785
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 83, Issue 24; ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

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