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Title: Edge-stress-induced warping of graphene sheets and nanoribbons
Authors: Shenoy, V.B.
Reddy, C.D.
Ramasubramaniam, A.
Zhang, Y.W. 
Issue Date: 8-Dec-2008
Citation: Shenoy, V.B., Reddy, C.D., Ramasubramaniam, A., Zhang, Y.W. (2008-12-08). Edge-stress-induced warping of graphene sheets and nanoribbons. Physical Review Letters 101 (24) : -. ScholarBank@NUS Repository.
Abstract: We show that edge stresses introduce intrinsic ripples in freestanding graphene sheets even in the absence of any thermal effects. Compressive edge stresses along zigzag and armchair edges of the sheet cause out-of-plane warping to attain several degenerate mode shapes. Based on elastic plate theory, we identify scaling laws for the amplitude and penetration depth of edge ripples as a function of wavelength. We also demonstrate that edge stresses can lead to twisting and scrolling of nanoribbons as seen in experiments. Our results underscore the importance of accounting for edge stresses in thermal theories and electronic structure calculations for freestanding graphene sheets. © 2008 The American Physical Society.
Source Title: Physical Review Letters
ISSN: 00319007
DOI: 10.1103/PhysRevLett.101.245501
Appears in Collections:Staff Publications

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