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First-principles Study Of The Atomic Structure And Edge State Of Zigzag Carbon Nanoscrolls

H. Dong, H. Dong, Baihua Gong, D. Fang, Yang Zhang, E. Zhang, Shengli Zhang
Published 2015 · Materials Science

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The atomic structure and edge state of zigzag carbon nanoscrolls (ZCNSs) are investigated using first-principles calculations based on density functional theory. The results show a non-monotonic dependence of the total energy of ZCNS on the surface curvature due to a competition between the elasticity and the van der Waals interactions in a scroll. The edge states can be tuned by using different forms of edge hydrogenation and inner radius. It is found that the edge state range of monohydrogenated ZCNSs is smaller than that of monohydrogenated zigzag-edged graphene nanoribbons (ZGNRs), which is also verified using the tight-binding approximation. With the different edge hydrogenations, ZCNSs prefer the sp2 hybridization more than the sp3 one. Our present study could suggest the possibility of adjusting the electronic properties of ZCNSs and may provide potential applications in the electronic devices.
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