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Lookup NU author(s): Dr Pooya Sareh
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© 2024 American Physical Society. In recent years, kirigami techniques have inspired the design of graphene-based nanodevices with exceptional stretchability and ductility. Based on an I-shaped cutting pattern, here we propose a graphene kirigami that exhibits remarkable stretchability and ductility in two independent planar directions along with negative Poisson's ratios. The deformation mechanism underlying the high stretchability of the structure is the flipping and rotation of its cutting ligaments during elongation. Molecular dynamics simulations show that the yield and fracture strains of graphene kirigami can be enhanced by factors of 6 and 10 in the two planar directions. In addition, the mechanical properties of the graphene kirigami can be tuned by altering the cutting geometric parameters as well as incorporating distinct cutting patterns in series. We develop a numerical algorithm to predict the stress-strain response of the series-connected graphene kirigami, and verify its accuracy using appropriate simulations. On this basis, the stress-strain response of the series-connected graphene kirigami can be tuned by altering its geometric parameters and the number of building blocks. This graphene kirigami could be applied to the design and development of next-generation flexible electronics such as stretchable electrodes and strain sensors.
Author(s): Shi P, Chen Y, Feng J, Sareh P
Publication type: Article
Publication status: Published
Journal: Physical Review E
Year: 2024
Volume: 109
Issue: 3
Online publication date: 15/03/2024
Acceptance date: 12/02/2024
ISSN (print): 2470-0045
ISSN (electronic): 2470-0053
Publisher: American Physical Society
URL: https://doi.org/10.1103/PhysRevE.109.035002
DOI: 10.1103/PhysRevE.109.035002
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