Plasma modification of carbon nanowalls induces transition from superhydrophobic to superhydrophilic

Stanislav A. Evlashin, Julia V. Bondareva, Timur F. Aslyamov, Yuriy V. Lyulin, Konstantin I. Maslakov, Kirill V. Mironovich, Michael A. Tarkhov, Henni Ouerdane

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Graphene-based materials play an essential role in a wide range of modern technologies due to their surface properties such as adsorption capacity and controllable wettability, which depend on the production methods. For practical applications, it is crucial to control the surface properties to achieve the desired wetting characteristics, which can be described with the contact angle (CA). Here, we experimentally investigate the wettability properties of the carbon nanowalls and show how to manage a wetting transition from superhydrophobic to superhydrophilic states. A CA of 170° was reached with direct plasma synthesis, while an angle smaller than 20° was achieved during the atmosphere plasma modification. Combining the formation of the surface groups due to the plasma treatment results and the macroscale wetting behavior in terms of the Cassie-Baxter model, we qualitatively explain how the observed wetting enhancement is induced by both controlled chemical and geometrical surfaceheterogeneity.

Original languageEnglish
Article number435706
JournalNanotechnology
Volume32
Issue number43
DOIs
Publication statusPublished - 22 Oct 2021

Keywords

  • Carbon nanowalls
  • Contact angle
  • Graphene
  • Plasma modification
  • Superhydrophobicity
  • Wettability

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