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Updated: Jul 10, 2026
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Gold Nanoparticle Synthesis
Published on: July 10, 2021
A study on gold nanoparticle synthesis using oleylamine as both reducing agent and protecting ligand
Xiong Liu1, Mark Atwater, Jinhai Wang
1Nanoscience Technology Center, Department of Chemistry and Department of Mechanical, Materials, and Aerospace Engineering, University of Central Florida, 12424 Research Parkway Suite 422, Orlando, Florida 32826, USA.
Journal of Nanoscience and Nanotechnology
|November 21, 2007
Summary
This study details gold nanoparticle synthesis in water using oleylamine. Oleylamine acts as both a reducing and protective agent, forming stable nanoparticles via a logistic growth model.
Area of Science:
- Nanomaterials Science
- Chemical Synthesis
- Physical Chemistry
Background:
- Gold nanoparticles (AuNPs) are crucial in catalysis, electronics, and medicine.
- Developing cost-effective and environmentally friendly synthesis methods is essential.
- Oleylamine is a versatile molecule with potential as both a reducing and capping agent.
Purpose of the Study:
- To investigate the synthesis mechanism and growth kinetics of gold nanoparticles.
- To explore the role of oleylamine as a single-phase solvent, reducing agent, and protective agent.
- To characterize the formation and stability of gold nanoparticles.
Main Methods:
- Fourier-transform infrared (FT-IR) spectroscopy and 1H Nuclear Magnetic Resonance (NMR) spectroscopy to analyze ligand transformation.
- UV-Vis absorption spectroscopy to monitor reaction progress and particle formation.
- Transmission electron microscopy (TEM) to determine nanoparticle size and morphology.
- Nonlinear regression analysis to model particle recombination kinetics.
Main Results:
- Oleylamine ligands converted to oleylamides during the reduction of gold.
- Instantaneous formation of oleylamine-gold salt aggregates observed.
- Elevated temperature (80°C) induced decomposition into small particles, followed by recombination into stable 9-10 nm AuNPs.
- Oleylamide ligands formed a protective monolayer via hydrogen bonding.
Conclusions:
- Oleylamine facilitates a controlled synthesis of stable gold nanoparticles in water.
- The growth mechanism follows a logistic model, indicating a self-limiting recombination process.
- This method offers a green and efficient route for gold nanoparticle production.
