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Controlling out‐of‐plane deformations of graphene nanobridges
Author(s) -
Nakajima T.,
Shintani K.
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201046298
Subject(s) - buckling , graphene nanoribbons , materials science , graphene , deformation (meteorology) , enhanced data rates for gsm evolution , amplitude , plane (geometry) , bond length , carbon nanotube , strain (injury) , condensed matter physics , ultimate tensile strength , nanotechnology , composite material , crystallography , geometry , chemistry , physics , optics , crystal structure , medicine , telecommunications , computer science , mathematics
Graphene nanoribbons (GNRs) can be applied to transistors, mass sensors, and dust detectors. Suspended GNRs which connect terminals in electronic devices like bridges can be treated as edge‐constrained GNRs. In this paper, edge‐constrained GNRs of various sizes and initial strains are studied using molecular dynamics (MD) simulations. To induce strain in GNRs, bond lengths between carbon atoms of the initial configurations of GNR models are varied. The bond length of the energetically stable GNRs is estimated at 1.47 Å. At this bond length, GNRs obviously change the tendencies of their energies, amplitudes, and deformations. The relationships between the out‐of‐plane deformations and the sizes of GNRs, and between the out‐of‐plane deformations and strains of GNRs are studied. Under compressive strain, the out‐of‐plane deformation of GNRs is dominantly caused by buckling. The amplitude of the buckling decreases as GNRs elongate. On the other hand, under tensile strain, the out‐of‐plane deformation of GNRs is caused by ripples and thermal vibrations. The ripples show regular patterns. It is suggested we can control the amplitudes of the out‐of‐plane deformations and ripple patterns of GNRs by adjusting their strain.