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Published on: September 2, 2017
Microstructural characterization of gold nanoparticles synthesized by solution plasma processing.
Sung-Pyo Cho1, Maria Antoaneta Bratescu, Nagahiro Saito
1Department of Materials, Physics and Energy Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan. cho@eco-t.esi.nagoya-u.ac.jp
Nanotechnology
|October 14, 2011
Summary
Solution plasma processing (SPP) creates more multiply twinned gold nanoparticles (Au NPs) than conventional chemical reduction synthesis (CRS). SPP
Area of Science:
- Nanotechnology
- Materials Science
- Physical Chemistry
Background:
- Gold nanoparticles (Au NPs) are crucial in various applications.
- Controlling the crystal structure of Au NPs influences their properties.
- Solution plasma processing (SPP) is an emerging method for nanomaterial synthesis.
Purpose of the Study:
- To investigate the microstructural characteristics of Au NPs synthesized via SPP.
- To compare the crystal structures of SPP-synthesized Au NPs with those from conventional chemical reduction synthesis (CRS).
- To understand the influence of SPP on the formation of specific Au NP crystal structures.
Main Methods:
- Fabrication of Au NPs using SPP in reverse micelle solutions.
- High-resolution transmission electron microscopy (HRTEM) for microstructural analysis.
- Comparison with Au NPs synthesized using conventional CRS.
Main Results:
- Au NPs synthesized by SPP and CRS exhibited similar average sizes (6.3 ± 1.4 nm).
- SPP resulted in a significantly higher proportion of multiply twinned particles (MTPs) and incomplete MTPs (~94%) compared to CRS (~63%).
- Both methods produced fcc single-crystalline, MTPs, and incomplete MTPs (single-nanotwinned fcc).
Conclusions:
- SPP is effective in synthesizing Au NPs with specific microstructural features.
- The enhanced formation of MTPs by SPP is attributed to highly reaction-activated species generated at low temperatures.
- SPP offers a promising alternative for controlled synthesis of complex nanostructures.
