Journal
PHYSICAL REVIEW B
Volume 83, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.83.245433
Keywords
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Funding
- Office of Energy Research, Materials Sciences and Engineering Division, of the US Department of Energy [DE-AC02-05CH11231]
- National Science Foundation within the Center of Integrated Nanomechanical Systems [EEC-0832819]
- National Science Foundation [0906539, DMR10-1006184]
- Samsung Scholarship
- UC Berkeley
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0906539] Funding Source: National Science Foundation
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The folding of paper, hide, and woven fabric has been used for millennia to achieve enhanced articulation, curvature, and visual appeal for intrinsically flat, two-dimensional materials. For graphene, an ideal two-dimensional material, folding may transform it to complex shapes with new and distinct properties. Here, we present experimental results that folded structures in graphene, termed grafold, exist, and their formations can be controlled by introducing anisotropic surface curvature during graphene synthesis or transfer processes. Using pseudopotential-density-functional-theory calculations, we also show that double folding modifies the electronic band structure of graphene. Furthermore, we demonstrate the intercalation of C(60) into the grafolds. Intercalation or functionalization of the chemically reactive folds further expands grafold's mechanical, chemical, optical, and electronic diversity.
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