Wrinkled Few-Layer Graphene as Highly Efficient Load Bearer

0476999 - ÚFCH JH 2018 RIV US eng J - Journal Article
Androulidakis, Ch. - Koukaras, E. N. - Řáhová, Jaroslava - Sampathkumar, Krishna - Parthenios, J. - Papagelis, K. - Frank, Otakar - Galiotis, C.
Wrinkled Few-Layer Graphene as Highly Efficient Load Bearer.
ACS Applied Materials and Interfaces. Roč. 9, č. 31 (2017), s. 26593-26601. ISSN 1944-8244. E-ISSN 1944-8252
R&D Projects: GA ČR GA14-15357S
Institutional support: RVO:61388955
Keywords : graphene * wrinkling * Raman spectroscopy
OECD category: Physical chemistry
Impact factor: 8.097, year: 2017

Multilayered graphitic materials are not suitable as load-bearers due to their inherent weak interlayer bonding (for example, graphite is a solid lubricant in certain applications). This situation is largely improved when two-dimensional (2D) materials such as a monolayer (SLG) graphene are employed. The downside in these cases is the presence of thermally or mechanically induced wrinkles which are ubiquitous in 2D materials. Here we set out to examine the effect of extensive large wavelength/amplitude wrinkling on the stress transfer capabilities of exfoliated simply supported graphene flakes. Contrary to common belief we present clear evidence that this type of “corrugation” enhances the load-bearing capacity of few-layer graphene as compared to “flat” specimens. This effect is the result of the significant increase of the graphene/polymer interfacial shear stress per increment of applied strain due to wrinkling and paves the way for designing affordable graphene composites with highly improved stress-transfer efficiency.
Permanent Link: http://hdl.handle.net/11104/0273395