Robust electromagnetic absorption by graphene/polymer heterostructures

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Résumé

Polymer/graphene heterostructures present good shielding efficiency against GHz electromagnetic perturbations. Theory and experiments demonstrate that there is an optimum number of graphene planes, separated by thin polymer spacers, leading to maximum absorption for millimeter waves Batrakov et al (2014 Sci. Rep. 4 7191). Here, electrodynamics of ideal polymer/graphene multilayered material is first approached with a well-adapted continued-fraction formalism. In a second stage, rigorous coupled wave analysis is used to account for the presence of defects in graphene that are typical of samples produced by chemical vapor deposition, namely microscopic holes, microscopic dots (embryos of a second layer) and grain boundaries. It is shown that the optimum absorbance of graphene/polymer multilayers does not weaken to the first order in defect concentration. This finding testifies to the robustness of the shielding efficiency of the proposed absorption device.

langue originaleAnglais
Numéro d'article285702
Nombre de pages9
journalNanotechnology
Volume26
Numéro de publication28
Les DOIs
étatPublié - 17 juil. 2015

Empreinte digitale

Electromagnetic wave absorption
Graphite
Graphene
Heterojunctions
Polymers
Shielding
Defects
Electrodynamics
Millimeter waves
Chemical vapor deposition
Multilayers
Grain boundaries
Experiments

Citer ceci

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title = "Robust electromagnetic absorption by graphene/polymer heterostructures",
abstract = "Polymer/graphene heterostructures present good shielding efficiency against GHz electromagnetic perturbations. Theory and experiments demonstrate that there is an optimum number of graphene planes, separated by thin polymer spacers, leading to maximum absorption for millimeter waves Batrakov et al (2014 Sci. Rep. 4 7191). Here, electrodynamics of ideal polymer/graphene multilayered material is first approached with a well-adapted continued-fraction formalism. In a second stage, rigorous coupled wave analysis is used to account for the presence of defects in graphene that are typical of samples produced by chemical vapor deposition, namely microscopic holes, microscopic dots (embryos of a second layer) and grain boundaries. It is shown that the optimum absorbance of graphene/polymer multilayers does not weaken to the first order in defect concentration. This finding testifies to the robustness of the shielding efficiency of the proposed absorption device.",
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Robust electromagnetic absorption by graphene/polymer heterostructures. / Lobet, Michaël; Reckinger, Nicolas; Henrard, Luc; Lambin, Philippe.

Dans: Nanotechnology, Vol 26, Numéro 28, 285702, 17.07.2015.

Résultats de recherche: Contribution à un journal/une revueArticle

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T1 - Robust electromagnetic absorption by graphene/polymer heterostructures

AU - Lobet, Michaël

AU - Reckinger, Nicolas

AU - Henrard, Luc

AU - Lambin, Philippe

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