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Graphene Oxide Sheets Combine into Conductive Coatings by Direct Oxidative Electropolymerization
S Halevy1, Y Bochlin1, Y Kadosh1
1Chemical Engineering Department, Ben-Gurion University of the Negev, Beer-Sheva, 84105, Israel.
Scientific Reports
|July 12, 2017
Summary
Further oxidation of graphene oxide creates new conductive coatings through electropolymerization. This process modifies edge groups, lowering oxygen content and increasing conductivity for advanced material applications.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Graphene oxide (GO) is a promising material with tunable properties.
- Electropolymerization offers a pathway for controlled material synthesis.
- Developing novel conductive coatings is crucial for electronic applications.
Purpose of the Study:
- To investigate the electropolymerization of graphene oxide sheets.
- To characterize the resulting coatings and their properties.
- To explore the relationship between oxidation potential and coating characteristics.
Main Methods:
- Electrochemical oxidation of graphene oxide at moderate anodic potentials (≤~1.3 V vs. Ag/AgCl).
- Spectroscopic analysis (e.g., FTIR, Raman) to determine chemical composition.
- Electrochemical techniques to assess conductivity and functional group formation.
Main Results:
- Successful electropolymerization of graphene oxide sheets via phenol edge group oxidation.
- Formation of ether or carboxylic groups depending on applied potential.
- Coatings exhibit a lower O/C ratio and increased C=C bonds due to decarboxylation.
- Enhanced aromatic conjugation leading to highly conductive coatings.
Conclusions:
- Graphene oxide can be directly electropolymerized to form novel conductive coatings.
- Controlled oxidation modifies GO structure, enhancing conductivity.
- These findings open avenues for advanced graphene-based materials in electronics.
