Gadolinium oxide-decorated graphene oxide-based dual-stimuli-responsive smart fluids

Hyukjoon Gwon ¹, Hamin Kim ¹, Seungae Lee ¹

⁰Department of Chemical Engineering, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Republic of Korea. salee@konkuk.ac.kr.

Nanoscale +

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February 4, 2025

View abstract on PubMed

Summary

New gadolinium oxide (Gd2O3) nanoparticle-decorated graphene oxide (GO) composites create dual-stimuli-responsive smart fluids. These electro-magneto-rheological (EMR) fluids offer tunable properties and enhanced stability for advanced material applications.

Area Of Science

Materials Science
Nanotechnology
Rheology

Background

Gadolinium compounds are known for dielectric and magnetic properties but haven't been used in smart fluids.
Graphene oxide (GO) is a key component in electro-responsive smart fluids.
Developing dual-stimuli-responsive materials is crucial for advanced applications.

Purpose Of The Study

To develop novel dual-stimuli-responsive smart fluids using gadolinium oxide (Gd2O3) based composites.
To investigate the electro- and magneto-rheological properties of Gd2O3 nanoparticle-decorated graphene oxide (Gd2O3/GO) composites.
To explore the tunability and stability of these novel electro-magneto-rheological (EMR) fluids.

Main Methods

Fabrication of Gd2O3 nanoparticle (NP)-decorated GO composites (Gd2O3/GO).
Decoration of Gd2O3 NPs with oleic acid for enhanced dispersion stability.
Investigation of the rheological properties of the resulting EMR fluids under electric and magnetic fields.

Main Results

Gd2O3/GO composites exhibited dual responsiveness to electric and magnetic fields.
Magnetic response increased with Gd2O3 content, while electric response decreased.
The EMR fluids showed tunable electro- and magneto-responsive properties and enhanced dispersion stability compared to GO-based fluids.

Conclusions

Gd2O3/GO composites are effective for creating dual-stimuli-responsive EMR fluids.
The Gd2O3 content is a critical factor in tuning the rheological behavior of these fluids.
This study expands the material choices for developing advanced smart fluid systems.