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Updated: Oct 26, 2025

Gold Nanoparticle Synthesis
13:42

Gold Nanoparticle Synthesis

Published on: July 10, 2021

15.1K

Gold Nanoparticle Synthesis.

Jonathan Marrs1, Taher Ghomian2, Lucas Domulevicz3

  • 1Department of Electrical and Computer Engineering, University of California, Davis; jdmarrs@ucdavis.edu.

Journal of Visualized Experiments : Jove
|July 26, 2021
PubMed
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This summary is machine-generated.

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This study details the synthesis of ~12 nm gold nanoparticles (Au nanoparticles) using tetrachloroauric acid and oleylamine. The resulting nanoparticles are stable for up to a year and can be redissolved in organic solvents.

Area of Science:

  • Nanotechnology
  • Materials Science
  • Chemistry

Background:

  • Gold nanoparticles (Au nanoparticles) have diverse applications in fields like catalysis, electronics, and medicine.
  • Controlling nanoparticle size and stability is crucial for optimizing their performance.
  • Developing efficient synthesis methods for well-defined Au nanoparticles is an ongoing area of research.

Purpose of the Study:

  • To synthesize gold nanoparticles (Au nanoparticles) with a specific size of approximately 12 nm.
  • To establish a reproducible method for producing stable Au nanoparticles suitable for long-term storage and redispersion.

Main Methods:

  • Rapid injection of tetrachloroauric acid and oleylamine in toluene into a boiling oleylamine/toluene solution.
  • Reaction mixture was heated and mixed for 2 hours, with color changes indicating nanoparticle formation.

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A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions
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  • Purification involved centrifugation, washing with toluene and methanol, and drying under vacuum.

    • Main Results:

    • Successfully synthesized gold nanoparticles (Au nanoparticles) with an average diameter of ~12 nm.
    • The synthesis resulted in a color change from clear to dark red, indicative of nanoparticle formation.
    • The final product was a stable black pellet of Au nanoparticles, storable for up to one year.

    Conclusions:

    • The described method provides a reliable route for synthesizing ~12 nm gold nanoparticles (Au nanoparticles).
    • The synthesized Au nanoparticles exhibit good stability and can be easily redissolved in organic solvents like toluene.
    • This synthesis approach offers potential for scalable production of functionalized gold nanoparticles.