Role of Temperature in the Growth of Silver Nanoparticles Through a Synergetic Reduction Approach.

X C Jiang,C Y Chen,C Y Chen,Ab Yu,W M Chen,W M Chen,S X Xiong

doi:10.1007/s11671-010-9780-1

X C Jiang, C Y Chen + Show 5 more

Open Access

https://doi.org/10.1007/s11671-010-9780-1

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Abstract

This study presents the role of reaction temperature in the formation and growth of silver nanoparticles through a synergetic reduction approach using two or three reducing agents simultaneously. By this approach, the shape-/size-controlled silver nanoparticles (plates and spheres) can be generated under mild conditions. It was found that the reaction temperature could play a key role in particle growth and shape/size control, especially for silver nanoplates. These nanoplates could exhibit an intensive surface plasmon resonance in the wavelength range of 700–1,400 nm in the UV–vis spectrum depending upon their shapes and sizes, which make them useful for optical applications, such as optical probes, ionic sensing, and biochemical sensors. A detailed analysis conducted in this study clearly shows that the reaction temperature can greatly influence reaction rate, and hence the particle characteristics. The findings would be useful for optimization of experimental parameters for shape-controlled synthesis of other metallic nanoparticles (e.g., Au, Cu, Pt, and Pd) with desirable functional properties.

Highlights

Precious metallic nanoparticles have become more attractive because of their fascinating functional properties such as optical, electronic, and physicochemical properties due to their high surface-to-volume effect [1,2,3,4,5,6,7]
We investigate the role of the reaction temperature in the shape-controlled synthesis of silver nanoplates through a synergetic reduction approach
In a boiling solution, citric acid will become more active in reducing silver ions than a lower temperature (e.g.,

Summary

Introduction

Precious metallic nanoparticles have become more attractive because of their fascinating functional properties such as optical, electronic, and physicochemical properties due to their high surface-to-volume effect [1,2,3,4,5,6,7]. The polyol-mediated synthesis, as a solvothermal reduction method, has been widely studied by Xia and his colleagues who demonstrated the shape control of silver nanoplates through heating ethylene glycol at a relatively high temperature (e.g., 160°C), which could lead to the kinetics or thermodynamics growth depending on experimental parameters [32,34,35,36]. We investigate the role of the reaction temperature in the shape-controlled synthesis of silver nanoplates through a synergetic reduction approach. In a boiling solution, citric acid will become more active in reducing silver ions than a lower temperature (e.g.,

Results and Discussion

Conclusions

El-Sayed MA