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How exfoliated Graphene Oxide nanosheets organize at water interface: evidences for a spontaneous bilayer self-assembly

Abstract

We probed Graphene Oxide adsorbed at the air-water interface by X-rays Reflectivity and Grazing Incidence X-Ray Diffraction using synchrotron sources. Surprisingly, the results of both measurements show that at non zero surface pressures, the film is organized as a bilayer of sheets interfaced between air and water with water molecules bridges. Such a spontaneous bilayer structure and its evolution with respect to the surface pressure is observed for the first time. These results should allow a precise control of the density of sheets deposited on the substrate when these films are transferred through the Langmuir-Blodgett or Schaefer procedures. Indeed, Graphene Oxide keeps on attracting more and more attention, increasing the need for the production of well-controlled Graphene Oxide thin films due to its interest for energy devices or in the sensor domains.

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Publication details

The article was received on 13 May 2017, accepted on 17 Jul 2017 and first published on 27 Jul 2017


Article type: Paper
DOI: 10.1039/C7NR03403B
Citation: Nanoscale, 2017, Accepted Manuscript
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    How exfoliated Graphene Oxide nanosheets organize at water interface: evidences for a spontaneous bilayer self-assembly

    N. Bonatout, F. Muller, P. Fontaine, I. Gascón, O. Konovalov and M. Goldmann, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03403B

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