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Enhancing Graphene Nanoplatelet Reactivity through Low-Temperature Plasma Modification.

Karolina Kadela1, Gabriela Grzybek1, Andrzej Kotarba1

  • 1Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387 Krakow, Poland.

ACS Applied Materials & Interfaces
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Summary

Low-temperature plasma treatment enhances graphene nanoplatelets by introducing oxygen functional groups. Acetic acid (CH3COOH) stabilization proved most effective for improving graphene

Keywords:
carbon materialselectron donor propertiesgraphenelow-temperature plasmaoxygen functional groupspostplasma reactivitysurface functionalization

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Nanotechnology

Background:

  • Graphene's potential is limited by poor dispersion and inertness in polar solvents.
  • Low-temperature plasma offers precise surface modification for improved material properties.
  • Plasma treatment enables rapid, controlled introduction of oxygen functional groups.

Purpose of the Study:

  • To systematically investigate plasma modification effects on graphene nanoplatelets.
  • To determine optimal plasma parameters, particularly exposure time, for maximizing oxygen functional groups.
  • To assess the stability and reactivity of plasma-modified graphene surfaces.

Main Methods:

  • Graphene nanoplatelets were treated using various gases (O2, CO2, air, Ar, C2H4) under low-temperature plasma.
  • X-ray photoelectron spectroscopy (XPS) characterized introduced oxygen functionalities.
  • Raman spectroscopy analyzed structural changes.
  • Immersion in liquids tested post-plasma reactivity.
  • Acetic acid (CH3COOH) was used for surface stabilization.

Main Results:

  • Plasma treatment successfully introduced oxygen functional groups onto graphene surfaces.
  • Optimal plasma parameters were identified for maximizing oxygen functionalization.
  • Plasma-induced surface changes were found to be unstable over time.
  • Surface stabilization with acetic acid (CH3COOH) was highly effective in retaining oxygen functional groups.

Conclusions:

  • Low-temperature plasma is a viable method for functionalizing graphene nanoplatelets.
  • Surface stabilization is crucial for maintaining plasma-induced modifications.
  • Optimized plasma treatment and subsequent stabilization enhance graphene's potential for applications.