Kinetics of monolayer graphene growth by segregation on Pd(111)
Abstract
Using in situ low-energy electron microscopy and density functional theory calculations, we follow the growth of monolayer graphene on Pd(111) via surface segregation of bulk-dissolved carbon. Upon lowering the substrate temperature, nucleation of graphene begins on graphene-free Pd surface and continues to occur during graphene growth. Measurements of graphene growth rates and Pd surface work functions establish that this continued nucleation is due to increasing C adatom concentration on the Pd surface with time. We attribute this anomalous phenomenon to a large barrier for attachment of C adatoms to graphene coupled with a strong binding of the non-graphitic C to the Pd surface.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 10, 2014
- Source ID
- 10.1063/1.4868386
Entities
People
- A. Ebnonnasir
- C. V. Ciobanu
- H. S. Mok
- K. F. Mccarty
- S. Kodambaka
- Shuai Nie
- Yasuhiro Murata
Organizations
- Colorado School of Mines
- Office of Naval Research
- Sandia National Laboratories
- University of California, Los Angeles