Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3495784
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Funding
- Office of Basic Energy Sciences, Division of Materials Sciences and Engineering of the U.S. DOE [DE-AC04-94AL85000]
- Northrop Grumman
- UC
- NSF [CMMI-0825592, CMMI-0846858]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [0825592, 0846858] Funding Source: National Science Foundation
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Selected-area diffraction establishes that at least six different in-plane orientations of monolayer graphene on Pd(111) can form during graphene growth. From the intensities of low-energy electron microscopy images as a function of incident electron energy, we find that the work functions of the different rotational domains vary by up to 0.15 eV. Density functional theory calculations show that these significant variations result from orientation-dependent charge transfer from Pd to graphene. These findings suggest that graphene electronics will require precise control over the relative orientation of the graphene and metal contacts. (C) 2010 American Institute of Physics. [doi:10.1063/1.3495784]
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