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Few-Layer Graphene from Mechanical Exfoliation of Graphite-Based Materials: Structure-Dependent Characteristics

1
Institut de Chimie et Procédés pour l’Énergie, l’Environnement et la Santé (ICPEES), CNRS UMR 7515-University of Strasbourg, 25 rue Becquerel, 67087 Strasbourg, France
2
Laboratoire des sciences de l′Ingénieur, de l′Informatique et de l′Imagerie (ICube), UMR 7357, CNRS – University of Strasbourg, 67400 Strasbourg, France
3
West Pomeranian University of Technology, Institute of Material Science and Engineering Piastow Av. 19, 70310 Szczecin, Poland
4
Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), CNRS UMR 7504-University of Strasbourg, France
*
Author to whom correspondence should be addressed.
ChemEngineering 2019, 3(2), 37; https://doi.org/10.3390/chemengineering3020037
Received: 19 February 2019 / Revised: 15 March 2019 / Accepted: 1 April 2019 / Published: 7 April 2019
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Abstract

We present a high-scale method to produce few-layer graphene (FLG) based on the mechanical exfoliation of graphite and compare the obtained FLG with the one reported earlier arising from pencil lead ablation. Several elements were modified and improved in the new approach. The purification and the ablation set-up were simplified, and the morphology of the FLG was modified and improved in view of some applications. The morphology-dependent properties of FLGs, lead-FLG, and graphite-FLG as conductive layers and in nanocomposites were investigated. The newly obtained FLG had a higher aspect ratio (high lateral size vs thickness/higher 2D aspect), which is reflected by enhanced transparency–conductivity features of the layer (film) and elongation-at-break behavior of the polymer composites. On the contrary, the nanocomposite containing lead-FLG showed, for instance, excellent gas barrier properties due to the multi-step structure of the lead-FLG flakes. Such structure exhibited less 2D and more 3D character, which can be highly suitable for applications where the presence of active/reactive edges is beneficial, e.g., in catalysis or supercapacitors’ electrodes. Nuclear reaction analysis was employed to investigate the morphology of graphite-FLG film. View Full-Text
Keywords: few-layer graphene; mechanical exfoliation; graphene nanocomposites; conductive layer; nuclear reaction analysis few-layer graphene; mechanical exfoliation; graphene nanocomposites; conductive layer; nuclear reaction analysis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Pirzado, A.A.; Le Normand, F.; Romero, T.; Paszkiewicz, S.; Papaefthimiou, V.; Ihiawakrim, D.; Janowska, I. Few-Layer Graphene from Mechanical Exfoliation of Graphite-Based Materials: Structure-Dependent Characteristics. ChemEngineering 2019, 3, 37.

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