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Issue 5, 2011
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Challenges for physical characterization of silver nanoparticles under pristine and environmentally relevant conditions

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Abstract

The reported size distribution of silver nanoparticles (AgNPs) is strongly affected by the underlying measurement method, agglomeration state, and dispersion conditions. A selection of AgNP materials with vendor-reported diameters ranging from 1 nm to 100 nm, various size distributions, and biocompatible capping agents including citrate, starch and polyvinylpyrrolidone were studied. AgNPs were diluted with either deionized water, moderately hard reconstituted water, or moderately hard reconstituted water containing natural organic matter. Rigorous physico-chemical characterization by consensus methods and protocols where available enables an understanding of how the underlying measurement method impacts the reported size measurements, which in turn provides a more complete understanding of the state (size, size distribution, agglomeration, etc.) of the AgNPs with respect to the dispersion conditions. An approach to developing routine screening is also presented.

Graphical abstract: Challenges for physical characterization of silver nanoparticles under pristine and environmentally relevant conditions

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Publication details

The article was received on 11 Jan 2011, accepted on 22 Feb 2011 and first published on 17 Mar 2011


Article type: Paper
DOI: 10.1039/C1EM10024F
Citation: J. Environ. Monit., 2011,13, 1212-1226
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    Challenges for physical characterization of silver nanoparticles under pristine and environmentally relevant conditions

    R. I. MacCuspie, K. Rogers, M. Patra, Z. Suo, A. J. Allen, M. N. Martin and V. A. Hackley, J. Environ. Monit., 2011, 13, 1212
    DOI: 10.1039/C1EM10024F

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