Issue 5, 2011
From the journal:

Journal of Environmental Monitoring

Challenges for physical characterization of silver nanoparticles under pristine and environmentally relevant conditions†

Robert I. MacCuspie,*a   Kim Rogers,*b   Manomita Patra,b   Zhiyong Suo,b   Andrew J. Allen,a   Matthew N. Martinac  and  Vincent A. Hackleya  

* Corresponding authors

a Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA
E-mail: robert.maccuspie@nist.gov, rogers.kim@epa.gov

b National Exposure Research Laboratory, Environmental Protection Agency, Las Vegas, NV, USA

c Materials Science and Engineering Department, University of Maryland, College Park, MD, USA

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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Article information

DOI
https://doi.org/10.1039/C1EM10024F
Article type
Paper
Submitted
11 Jan 2011
Accepted
22 Feb 2011
First published
17 Mar 2011

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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