. "Failure Processes in Embedded Monolayer Graphene under Axial Compression" . . "monoleyer graphene; phonons; physical chemistry"@en . "Tsoukleri, G." . . "8"^^ . "Failure Processes in Embedded Monolayer Graphene under Axial Compression"@en . "10"^^ . "GB - Spojen\u00E9 kr\u00E1lovstv\u00ED Velk\u00E9 Brit\u00E1nie a Severn\u00EDho Irska" . . "Scientific Reports" . . "Failure Processes in Embedded Monolayer Graphene under Axial Compression" . "RIV/61388955:_____/14:00428888!RIV15-GA0-61388955" . "10.1038/srep05271" . "Parthenios, J." . "Pugno, N." . "JUN 2014" . . "1"^^ . "Galiotis, C." . . "I, P(GA14-15357S)" . . "16397" . . "2045-2322" . . . . . "4" . "Novoselov, K. S." . "Koukaras, E. N." . "Exfoliated monolayer graphene flakes were embedded in a polymer matrix and loaded under axial compression. By monitoring the shifts of the 2D Raman phonons of rectangular flakes of various sizes under load, the critical strain to failure was determined. Prior to loading care was taken for the examined area of the flake to be free of residual stresses. The critical strain values for first failure were found to be independent of flake size at a mean value of \u20130.60% corresponding to a yield stress up to -6 GPa. By combining Euler mechanics with a Winkler approach, we show that unlike buckling in air, the presence of the polymer constraint results in graphene buckling at a fixed value of strain with an estimated wrinkle wavelength of the order of 1\u20132 nm. These results were compared with DFT computations performed on analogue coronene/ PMMA oligomers and a reasonable agreement was obtained." . "000337226100009" . "[249AE894148E]" . . "Papagelis, K." . . "Failure Processes in Embedded Monolayer Graphene under Axial Compression"@en . "Sfyris, D." . "Exfoliated monolayer graphene flakes were embedded in a polymer matrix and loaded under axial compression. By monitoring the shifts of the 2D Raman phonons of rectangular flakes of various sizes under load, the critical strain to failure was determined. Prior to loading care was taken for the examined area of the flake to be free of residual stresses. The critical strain values for first failure were found to be independent of flake size at a mean value of \u20130.60% corresponding to a yield stress up to -6 GPa. By combining Euler mechanics with a Winkler approach, we show that unlike buckling in air, the presence of the polymer constraint results in graphene buckling at a fixed value of strain with an estimated wrinkle wavelength of the order of 1\u20132 nm. These results were compared with DFT computations performed on analogue coronene/ PMMA oligomers and a reasonable agreement was obtained."@en . . "RIV/61388955:_____/14:00428888" . "Frank, Otakar" . "Androulidakis, Ch." .