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Updated: Jul 12, 2025
10:09
Synthesis and Characterization of Amphiphilic Gold Nanoparticles
Published on: July 2, 2019
17.5K
Composite ligand shells on gold nanoprisms - an ensemble and single particle study
Dániel Zámbó1, Dávid Kovács1,2, Gergely Südi1,2
1Centre for Energy Research Konkoly-ThegeM. Str. 29-33 Budapest 1121 Hungary andras.deak@ek.hun-ren.hu.
RSC Advances
|October 23, 2023
Summary
Thiolated molecule adsorption on gold nanoprisms impacts optical properties. Sequential thiol addition creates distinct layers, while simultaneous addition forms denser, intermixed layers for enhanced loading.
Area of Science:
- Nanotechnology
- Surface Chemistry
- Plasmonics
Background:
- Thiolated molecules on gold surfaces are key for plasmonic materials.
- Understanding ligand layer formation is crucial for controlling nanooptical properties.
Purpose of the Study:
- Investigate thiol adsorption effects on gold nanoprism optical properties.
- Compare sequential versus simultaneous ligand addition strategies.
Main Methods:
- Wet-chemical synthesis of gold nanoprisms.
- Ensemble and single-particle optical measurements.
- Adsorption studies using (16-mercaptohexadecyl)trimethylammonium bromide (MTAB) and thiolated polyethylene glycol (mPEG-SH).
Main Results:
- Sequential thiol addition results in composite, island-like ligand layers.
- Simultaneous thiol addition forms a denser, intermixed ligand layer.
- Single-particle experiments reveal distinct chemical interface damping and resonance energy shifts.
Conclusions:
- Sequential adsorption is optimal for diverse surface functionalities.
- Simultaneous adsorption favors higher overall ligand loading.
- Ligand addition strategy significantly influences gold nanoprism optical properties.
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