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Related Experiment Video

Updated: Sep 6, 2025

Multifunctional Hybrid Fe2O3-Au Nanoparticles for Efficient Plasmonic Heating
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A novel approach for engineering efficient nanofluids by radiolysis.

M Maaza1,2, T Khamliche3,4, M Akbari3,4

  • 1UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria, South Africa. Maazam@unisa.ac.za.

Scientific Reports
|June 24, 2022
PubMed
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This study demonstrates radiolysis for creating stable, efficient silver nanofluids with improved thermal conductivity. Gamma radiolysis fabrication shows dose-dependent enhancements in Ag-H2O and Ag-C2H6O2 nanofluids.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Radiochemistry

Background:

  • Nanofluids offer enhanced thermal properties compared to base fluids.
  • Developing stable and efficient nanofluids is crucial for advanced heat transfer applications.
  • Radiolysis presents a novel method for nanofluid synthesis.

Purpose of the Study:

  • To investigate the use of radiolysis for fabricating stable and efficient silver nanofluids.
  • To evaluate the impact of gamma radiolysis on the thermal conductivity of Ag-H2O and Ag-C2H6O2 nanofluids.
  • To determine the dose-dependent behavior of thermal conductivity enhancement.

Main Methods:

  • Fabrication of silver (Ag) nanofluids using gamma (γ) radiolysis.
  • Synthesis of Ag-H2O and Ag-C2H6O2 nanofluids within a specific gamma dose range.

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  • Measurement of thermal conductivity of the synthesized nanofluids.
  • Analysis of the dose-dependent relationship between gamma radiation and thermal conductivity.

    • Main Results:

    • Stable and efficient Ag-H2O and Ag-C2H6O2 nanofluids were successfully synthesized via γ-radiolysis.
    • Enhanced thermal conductivity was observed in both types of nanofluids.
    • The thermal conductivity enhancement was found to be dependent on the applied gamma radiation dose.
    • A maximum relative enhancement of 23.57% in thermal conductivity was achieved for Ag-C2H6O2 nanofluid at 1.80 × 10^3 Gray.

    Conclusions:

    • Radiolysis is a viable method for engineering stable and efficient nanofluids with enhanced thermal conductivity.
    • The gamma radiolysis process offers a controllable route to tune the thermal performance of nanofluids.
    • Further optimization of the radiolysis parameters can potentially lead to even greater thermal conductivity enhancements.