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2015 - 2018 N° FEDER : AV3734

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Program new researcher "FluoGIL FluoroGraphen by laser induction"

- Duration of the project : 36 months

- Leader : N. BATISSE

- Financial support :

  • Participation FEDER : 54 000 €
  • Participation Région : 20 000 € (equipment), 16 000 € (post-doctoral)

Graphene, a single layer of carbon atoms, combines exceptional properties such as mechanical, electrical or thermal ones, and paves the way for new opportunities in a wide range of applications like in electronics devices or energy storage systems. Actually, it is probably one of the most studied materials. Its analogues and particularly fluorographene, have been less investigated due to the difficulties to synthesize and structure them.

The project FluoGIL will focus in a three-steps timeline, on the synthesis of (fluoro)graphenes by exfoliation of graphite fluoride, on their microstructuration and their spatially selective fluorination by introducing the common concept of induction or initiation of reaction by femtosecond pulses of a laser source.

The first part of this project is devoted to the synthesis of fluorographene, and subsequently of graphene, by exfoliation of graphite fluoride by laser shocks induced by ultrashort energy pulses. The interests of this strategy lie on obtaining less defects on exfoliated sheets and a better control of surfaces functionalities and virtually no impurities, through the fine tuning allowed by a laser source on the critical parameters of exfoliation (including control of the minimum energy required to separate the sheets).

In the second step, microstructuration of previously synthesized graphene materials will be performed by femtosecond laser ablation. By using high laser irradiation conditions, fluorographenes or graphene films will be microstructured according to defined geometries. This will allow to target the two applicative fields of the project: graphene-based microsupercapacitors and the creation of surfaces with hydrophobic or tribological properties.

Finally, the third part of this project will be devoted to a new approach of direct fluorination by initiating the reactivity of molecular fluorine with a carbon matrix (graphene, in this case) by laser pulses in order to achieve the concept of spatially selective fluorination. The benefit of this method will be to create surfaces with gradients of fluorine content. The microfabrication system assisted by a femtosecond laser source that we have developed is fully functional since April 2016.