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Updated: Feb 9, 2026
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Dispersion of Nanomaterials in Aqueous Media: Towards Protocol Optimization
Published on: December 25, 2017
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Assisted Tip Sonication Approach for Graphene Synthesis in Aqueous Dispersion
Ahmed F Ghanem1, Mona H Abdel Rehim2
1Packaging Materials Department, National Research Centre, Elbehoth Street 33, Dokki, Cairo 12622, Egypt. af.ghanem@nrc.sci.eg.
Biomedicines
|May 31, 2018
Summary
Researchers synthesized dispersed graphene nanoplatelets (DGP) using an aqueous dispersion technique. This method yields high-quality graphene with superior conductivity and an ideal structure for optoelectronic applications.
Area of Science:
- Materials Science
- Nanotechnology
- Chemistry
Background:
- Graphene (G) is a novel material with significant potential across various applications.
- Achieving high-quality graphene production with good yield remains a key research objective.
Purpose of the Study:
- To synthesize dispersed graphene nanoplatelets (DGP) via an aqueous dispersion technique.
- To compare DGP properties with graphene oxide (GO) and reduced graphene oxide (RGO) prepared chemically.
- To evaluate DGP's suitability for optoelectronic applications.
Main Methods:
- Aqueous dispersion of graphene nanoplatelets using tip sonication in a surfactant/water solution.
- Chemical synthesis of graphene oxide (GO) and reduced graphene oxide (RGO) for comparative analysis.
- Characterization using elemental analysis, UV-Vis spectroscopy, Raman spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and atomic force microscopy (AFM).
Main Results:
- DGP exhibited an ideal C:O ratio of 12:1, confirmed by elemental analysis.
- Optical and structural characterization (UV, Raman, XRD, TEM) indicated an ideal, few-layered, amorphous structure for DGP.
- Electrochemical measurements demonstrated higher conductivity in DGP compared to chemically prepared graphene, attributed to fewer structural defects.
Conclusions:
- The aqueous dispersion method successfully produced high-quality dispersed graphene nanoplatelets (DGP).
- DGP possesses superior structural integrity and conductivity compared to other graphene forms.
- The perfect structure of DGP enhances charge carrier mobility, making it highly suitable for optoelectronic applications.
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