Related Experiment Video
Updated: Apr 23, 2026
03:54
Author Spotlight: Designing Sustainable Nanomaterials for Advancing Synthesis and Element Mixing
Published on: March 15, 2024
1.5K
Plasmonic biocompatible silver-gold alloyed nanoparticles
Georgios A Sotiriou1, Gion Diego Etterlin, Anastasia Spyrogianni
1Particle Technology Laboratory, Institute of Process Engineering, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, Zurich 8092, Switzerland. sotiris.pratsinis@ptl.mavt.ethz.ch.
Chemical Communications (Cambridge, England)
|September 23, 2014
Summary
Adding gold to nanosilver synthesis creates stable, biocompatible silver-gold nanoalloy particles. These particles show enhanced plasmonic properties, reducing oxidation and toxic ion leaching for theranostic applications.
Area of Science:
- Nanotechnology
- Materials Science
- Biomedical Engineering
Background:
- Nanosilver (Ag) particles are widely used but suffer from surface oxidation and leaching of toxic silver ions (Ag+).
- Pure gold (Au) nanoparticles are often used for plasmonic applications but can be expensive.
- Developing stable, cost-effective nanomaterials with enhanced properties is crucial for advanced applications.
Purpose of the Study:
- To investigate the effect of gold addition on the properties of nanosilver during scalable synthesis.
- To evaluate the stability, biocompatibility, and plasmonic performance of silver-gold nanoalloyed particles.
- To explore the potential of these novel nanoalloys in theranostic applications.
Main Methods:
- Scalable synthesis of silver-gold nanoalloyed particles with varying compositions.
- Characterization of particle morphology, surface chemistry, and stability using techniques like electron microscopy and spectroscopy.
- Assessment of plasmonic properties and comparison with pure gold nanoparticles.
- Evaluation of biocompatibility and potential for theranostic applications.
Main Results:
- Addition of gold during nanosilver synthesis significantly reduced surface oxidation.
- Leaching of toxic silver ions (Ag+) from the nanoalloyed particles was drastically minimized.
- The silver-gold nanoalloys demonstrated superior plasmonic performance compared to pure gold nanoparticles.
- The synthesized particles were found to be biocompatible and inexpensive.
Conclusions:
- Scalable synthesis of silver-gold nanoalloys offers a promising strategy to overcome the limitations of pure nanosilver.
- These nanoalloyed particles exhibit enhanced stability and reduced toxicity, making them attractive for biomedical use.
- The superior plasmonic performance and cost-effectiveness position these silver-gold nanoalloys as strong candidates for theranostic applications.
