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Updated: Aug 6, 2025
10:09
Synthesis and Characterization of Amphiphilic Gold Nanoparticles
Published on: July 2, 2019
17.6K
The Interaction of Amines with Gold Nanoparticles
Yanchao Lyu1, Lucia Morillas Becerril1, Mirko Vanzan1
1Department of Chemical Sciences, University of Padova, Via Marzolo, 1, Padova, 35131, Italy.
Advanced Materials (Deerfield Beach, Fla.)
|March 23, 2023
Summary
Amines interact with gold nanoparticle surfaces based on their basicity and steric hindrance. This interaction influences nanoparticle stability and is crucial for developing advanced nanozymes.
Area of Science:
- Nanotechnology
- Surface Chemistry
- Biomaterials
Background:
- Interactions between amines and gold nanoparticles (Au NPs) are vital for nanosystem stabilization.
- Understanding these interactions is key for protein corona formation and semisynthetic nanozyme preparation.
Purpose of the Study:
- To elucidate the detailed interactions between amines and gold nanoparticle surfaces.
- To correlate amine properties with binding strength and kinetics on Au NPs.
Main Methods:
- Fluorescence spectroscopy
- Electrochemistry
- X-ray photoelectron spectroscopy (XPS)
- High-resolution transmission electron microscopy (HRTEM)
- Molecular simulation
Main Results:
- Amine interaction strength with surface Au(0) atoms correlates linearly with basicity, adjusted for steric hindrance.
- Binding kinetics vary with gold atom location (surfaces vs. edges).
- Amines reduce residual Au(I) to Au(0), forming stronger interactions with bridging nitrogen atoms.
Conclusions:
- Amine-gold nanoparticle interactions are governed by electronic and steric factors.
- Stable Au nanoparticles for nanozymes are best prepared with partial protein involvement in gold ion reduction.
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