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Manikas AC, Pastore Carbone MG, Woods CR, Wang Y, Souli I, Anagnostopoulos G, Hadjinicolaou M, Novoselov KS, Galiotis C. Stress transfer at the nanoscale on graphene ribbons of regular geometry. Nanoscale 2019; 11:14354-14361. [PMID: 31332419 DOI: 10.1039/c9nr03166a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The knowledge of the mechanism of stress transfer from a polymer matrix to a 2-dimensional nano-inclusion such as a graphene flake is of paramount importance for the design and the production of effective nanocomposites. For efficient reinforcement the shape of the inclusion must be accurately controlled since the axial stress transfer from matrix to the inclusion is affected by the axial-shear coupling observed upon loading of a flake of irregular geometry. Herein, we study true axial phenomena on regular- exfoliated-graphene micro-ribbons which are perfectly aligned to the loading direction. We exploit the strain sensitivity of vibrational wave numbers in order to map point-by-point the strain built up along the length of graphene. By considering the balance of shear-to-axial forces, we identify the shear stress at the interface and develop a universal inverse-length parameter that governs the stress transfer process at the nanoscale. An important parameter that has come out of this approach is the prediction and measurement of the transfer length that is required for efficient stress in these systems.
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Affiliation(s)
- A C Manikas
- Institute of Chemical Engineering, Foundation for Research and Technology Hellas (ICEHT/FORTH), Stadium St., Platani, 26504, Patras, Greece. and Department of Chemical Engineering, University of Patras, Patras 26504, Greece
| | - M G Pastore Carbone
- Institute of Chemical Engineering, Foundation for Research and Technology Hellas (ICEHT/FORTH), Stadium St., Platani, 26504, Patras, Greece.
| | - C R Woods
- School of Physics and Astronomy, University of Manchester, Manchester, UK
| | - Y Wang
- School of Physics and Astronomy, University of Manchester, Manchester, UK
| | - I Souli
- Institute of Chemical Engineering, Foundation for Research and Technology Hellas (ICEHT/FORTH), Stadium St., Platani, 26504, Patras, Greece.
| | - G Anagnostopoulos
- Institute of Chemical Engineering, Foundation for Research and Technology Hellas (ICEHT/FORTH), Stadium St., Platani, 26504, Patras, Greece.
| | - M Hadjinicolaou
- Hellenic Open University, School of Science and Technology, Applied Mathematics Laboratory, Patras, Greece
| | - K S Novoselov
- School of Physics and Astronomy, University of Manchester, Manchester, UK
| | - C Galiotis
- Institute of Chemical Engineering, Foundation for Research and Technology Hellas (ICEHT/FORTH), Stadium St., Platani, 26504, Patras, Greece.
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