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2 Polish Journal of Chemistry

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Experimental and Modeling Study on Precipitation Kinetics of Silver in Nano and Micron Scale

Manteghian M., Ghader S.

Polish Journal of Chemistry

2009

Vol. 83, nr 4

625-639

In the present study, reaction crystallization of silver micron and nanoparticles was studied in a batch crystallizer in two different set of experiments by reducing silver in the presence or absence of sodium citrate. From the experimental determination of crystalsize distribution, and with the aid of a mathematical model of the process, nucleation and growth kinetics of silver nanoparticles were de termined. Kinetic parameters were determined by fitting the power law expression to the experimental data. Nanoparticle growth rates indicate a diffusion controlled mechanism with a first order dependence on supersaturation, while the observed low dependence of nucleation rate on magma density imply the primary nucleation occurring. Never the less, in the synthesis of micron particles magma density was important and agglomeration took place and nucleation, volume crystal growth rates as well as agglomeration kernel were determined.

Preparation of Truncated Triangular Silver Nanoparticles by a Simple and Rapid Method in Aqueous Solution

Ghader S., Manteghian M., Kokabi M., Sarraf Mamoory R.

Polish Journal of Chemistry

2007

Vol. 81, nr 9

1555-1565

The paper brings details of a simple method for rapid synthesis of triangular silver nanoparticles and their characterization. The method presented proceeds with a simple reaction in aqueous solution at ambient temperature and nanotriangles are synthesized in a few minutes. The formation of triangular nanoparticles was investigated by UV-VIS spectroscopy. Transmission electron microscopy (TEM) images of nanoparticles show that resulting triangles are truncated. The concentration of reactants and pH were found to have influence on the shape of resulting nanoparticles. These results indicate that hydrazine and citrate are necessary for formation of triangular nanoparticles.