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Plasma Electrochemistry: How to Control the Size and Size Distribution of Au Nanoparticles
Here, we present plasma electrochemical approach to control the size and size distribution of Au nanoparticles. We initially prepared an aqueous solution including HAuCl4 and carried out PER (single-step process). In order to grow Au nanoparticles, we synthesized Au seed by PER. Afterwards, Au precursor was slowly added to grow Au seed (multi-step process). As the results, multi-step process successfully synthesized the size of Au nanoparticles at the range from ~60 nm to ~1 um
To characterize the nanoparticle films, we have employed Ultraviolet-Visible absorbance spectroscopy, Nanoparticle size and Stability Analyzer, scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
Acknowledgment
This work was supported by R&D Program of ‘Plasma Convergence & Fundamental Research’ through the National Fusion Research Institute of Korea (NFRI) funded by the Government funds.
References
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Figure: Photo and particle size analysis of Au nanoparticles after single-step and multi-step plasma electrochemical reduction .