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Issue 4, 2013
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A growth kinetic study of ultrafine monodispersed silver nanoparticles

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Abstract

In this article we report the growth kinetics of ultrafine monodispersed silver nanoparticles prepared via thermal reduction of silver nitrate with oleylamine. Effect of nucleation and growth temperature and time on the quality and quantity of silver nanoparticles was monitored in terms of product yield, crystal phase, morphology, aggregation, particle size and size distribution. To understand the effect of kinetic parameters, purified silver nanoparticles were characterized by UV-visible, FTIR and photon correlation spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermogravimetry (TG). Irrespective of the kinetic conditions, oleylamine always reduces AgNO3 into spherical Ag nanoparticles with simple cubic structure. The nanoparticle yield is highest for 21 mM oleylamine. Its size decreases with increasing oleylamine concentration and levels off at 3.5 nm with a polydispersity of 0.12. When concentration of oleylamine is <15 mM, agglomerated silver nanoparticles resulted while they self-assembled into hexagonal close pack structure when oleylamine is ≥15 mM. Nucleation at 200 °C for 30 min and growth at 150 °C for 4 h are the optimum processing parameters for highest nanoparticle yield (60%), lowest particle size (3.5 nm) and polydispersity index (0.12) with no or very little agglomeration.

Graphical abstract: A growth kinetic study of ultrafine monodispersed silver nanoparticles

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Publication details

The article was received on 23 Aug 2012, accepted on 13 Nov 2012 and first published on 14 Nov 2012


Article type: Paper
DOI: 10.1039/C2RA21912C
Citation: RSC Adv., 2013,3, 1127-1136
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    A growth kinetic study of ultrafine monodispersed silver nanoparticles

    Chandni, N. Andhariya, O. Pandey and B. Chudasama, RSC Adv., 2013, 3, 1127
    DOI: 10.1039/C2RA21912C

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