Mosaic pattern formation in exfoliated graphene by mechanical deformation

Maria Giovanna Pastore Carbone, Anastasios C. Manikas, Ioanna Souli, Christos Pavlou and Costas Galiotis ()
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Maria Giovanna Pastore Carbone: Foundation of Research and Technology-Hellas (FORTH/ICE-HT)
Anastasios C. Manikas: Foundation of Research and Technology-Hellas (FORTH/ICE-HT)
Ioanna Souli: Foundation of Research and Technology-Hellas (FORTH/ICE-HT)
Christos Pavlou: Foundation of Research and Technology-Hellas (FORTH/ICE-HT)
Costas Galiotis: Foundation of Research and Technology-Hellas (FORTH/ICE-HT)

Nature Communications, 2019, vol. 10, issue 1, 1-7

Abstract: Abstract Graphene is susceptible to morphological instabilities such as wrinkles and folds, which result from the imposition of thermo-mechanical stresses upon cooling from high temperatures and/ or under biaxial loading. A particular pattern encountered in CVD graphene is that of mosaic formation. Although it is understood that this pattern results from the severe biaxial compression upon cooling from high temperatures, it has not been possible to create such a complex pattern at room temperature by mechanical loading. Herein, we have managed by means of lateral wrinkling induced by tension and Euler buckling resulting from uniaxial compression upon unloading, to create such patterns in exfoliated graphene. We also show that these patterns can be used as channels for trapping or administering fluids at interstitial space between graphene and its support. This opens a whole dearth of new applications in the area of nano-fluidics but also in photo-electronics and sensor technologies.

Date: 2019
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DOI: 10.1038/s41467-019-09489-z

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