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Large-scale synthesis and self-organization of silver nanoparticles with Tween 80 as a reductant and stabilizer

Hui-Jun Li12, An-Qi Zhang3, Yang Hu12, Li Sui4, Dong-Jin Qian12 and Meng Chen12*

Author affiliations

1 Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, People’s Republic of China

2 Advanced Materials Laboratory, Fudan University, Shanghai 200433, People’s Republic of China

3 Department of Materials Science, Fudan University, Shanghai 200433, People’s Republic of China

4 School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, People’s Republic of China

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Citation and License

Nanoscale Research Letters 2012, 7:612  doi:10.1186/1556-276X-7-612

Published: 6 November 2012

Abstract

Tween 80 (polysorbate 80) has been used as a reducing agent and protecting agent to prepare stable water-soluble silver nanoparticles on a large scale through a one-pot process, which is simple and environmentally friendly. Silver ions can accelerate the oxidation of Tween 80 and then get reduced in the reaction process. The well-ordered arrays such as ribbon-like silver nanostructures could be obtained by adjusting the reaction conditions. High-resolution transmission electron microscopy confirms that ribbon-like silver nanostructures (approximately 50 nm in length and approximately 2 μm in width) are composed of a large number of silver nanocrystals with a size range of 2 to 3 nm. In addition, negative absorbance around 320 nm in the UV-visible spectra of silver nanoparticles has been observed, probably owing to the instability of nanosized silver colloids.

Keywords:
Silver; Nanoparticles; Tween 80; Discrete dipole approximation (DDA)