Graphene Induced Surface Reconstruction of Cu

Author

• Jifa Tian, Birck Nanotechnology Center, Purdue UniversityFollow
• Helin Cao, Birck Nanotechnology Center, Purdue UniversityFollow
• Wei Wu, University of Houston
• Qingkai Yu, Texas State University San Marcos
• Nathan P. Guisinger, Argonne National Laboratory
• Yong P. Chen, Birck Nanotechnology Center, Purdue UniversityFollow

Abstract

An atomic-scale study utilizing scanning tunneling microscopy (STM) in ultrahigh vacuum (UHV) is performed on large single crystalline graphene grains synthesized on Cu foil by a chemical vapor deposition (CVD) method. After thermal annealing, we observe the presence of periodic surface depressions (stripe patterns) that exhibit long-range order formed in the area of Cu covered by graphene. We suggest that the observed stripe pattern is a Cu surface reconstruction formed by partial dislocations (which appeared to be stair-rod-like) resulting from the strain induced by the graphene overlayer. In addition, these graphene grains are shown to be more decoupled from the Cu substrate compared to previously studied grains that exhibited Moire patterns.

Keywords

Graphene; Cu; STM; strain; surface reconstruction; dislocation; CHEMICAL-VAPOR-DEPOSITION; SCANNING-TUNNELING-MICROSCOPY; EPITAXIAL GRAPHENE; ATOMIC-STRUCTURE; ELECTRONIC-PROPERTIES; GRAIN-BOUNDARIES; COPPER FOILS; LARGE-AREA; FILMS; SCATTERING

DOI

10.1021/nl3002974

Citation

Jifa Tian, Helin Cao, Wei Wu, Qingkai Yu, Nathan P. Guisinger, and Yong P. Chen. Nano Lett., 2012, 12 (8), pp 3893–3899. DOI: 10.1021/nl3002974

Date of this Version

8-2012

Recommended Citation

Tian, Jifa; Cao, Helin; Wu, Wei; Yu, Qingkai; Guisinger, Nathan P.; and Chen, Yong P., "Graphene Induced Surface Reconstruction of Cu" (2012). Birck and NCN Publications. Paper 1150.
http://dx.doi.org/10.1021/nl3002974