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Issue 116, 2015
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Synthesis of silver nanoparticles in a microfluidic coaxial flow reactor

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Abstract

The size and dispersity of nanoparticles (NPs) determine the properties that such particles display. In this study, synthesis of silver nanoparticles in a coaxial flow reactor (CFR) was investigated by confining the reaction and subsequent nucleation to an interface away from the channel wall. Silver NPs were formed at room temperature by reducing silver nitrate with sodium borohydride in the presence of sodium hydroxide, while trisodium citrate was used as the surfactant. The main parameters investigated were flow rate of reagents through the CFR and concentrations of trisodium citrate and silver nitrate. Decreasing the total flow rate resulted in the NP size and dispersity reducing from 5.4 ± 3.4 nm to 3.1 ± 1.6 nm. Increasing surfactant concentration reduced size and dispersity from 8.5 ± 6.9 nm to 4.1 ± 1.1 nm. By tuning the precursor concentration the size and dispersity could be reduced from 9.3 ± 3 nm to 3.7 ± 0.8 nm.

Graphical abstract: Synthesis of silver nanoparticles in a microfluidic coaxial flow reactor

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Publication details

The article was received on 28 Aug 2015, accepted on 27 Oct 2015 and first published on 06 Nov 2015


Article type: Paper
DOI: 10.1039/C5RA17466J
Citation: RSC Adv., 2015,5, 95585-95591
  • Open access: Creative Commons BY license
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    Synthesis of silver nanoparticles in a microfluidic coaxial flow reactor

    R. Baber, L. Mazzei, N. T. K. Thanh and A. Gavriilidis, RSC Adv., 2015, 5, 95585
    DOI: 10.1039/C5RA17466J

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