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Nanoscale friction of graphene oxide over glass-fibre and polystyrene

journal contribution
posted on 2023-06-09, 14:53 authored by Manoj TripathiManoj Tripathi, Haroon Mahmood, David Novel, Erica Iacob, Lia Vanzetti, Ruben Bartali, Giorgio Speranza, Alessandro Pegoretti, Nicola Pugno
Coatings of graphene oxide over two substrates of glass-fibre and polystyrene were obtained by electrophoretic deposition (EPD). A chemical reduction of graphene oxide by exposure to hydrazine hydrate at 100?°C significantly changes the interfacial interaction with the substrate as well as the tribology. Spectroscopic techniques like Fourier transform infrared, Raman spectroscopy, X-ray photoelectron spectroscopy and X-ray diffraction showed that the treatment with hydrazine replaces oxygen functional groups and also induces roughness, a structural disorder and decreases the interlayer separation in the transition from graphene oxide (GO) to reduced graphene oxide (rGO). Treatment with hydrazine reduces adhesion and friction force against diamond like carbon coated Si probe (DLC AFM) at the basal plain of the coatings. Investigation at the edges revealed that the presence of oxygenic functional groups leads to higher shear strength with glass-fibre and polystyrene which reduces after treatment with hydrazine.

History

Publication status

  • Published

Journal

Composites Part B: Engineering

ISSN

1359-8368

Publisher

Elsevier

Volume

148

Page range

272-280

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Materials Physics Group Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2018-09-03

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