Silver nanoparticles (AgNPs) are one of the most common engineered nanomaterials found in consumer products. Silver’s antimicrobial and antibacterial properties make AgNPs a desirable material to incorporate into products in the fields of medicine, food packaging, cosmetics, and textiles. AgNPs incorporated into textiles are currently of special interest, as the fate of these AgNPs in environmental and biological systems once released from the textile is poorly characterized. In order to better understand how these AgNPs will interact with environmental and biological systems, it is important to understand the release mechanism of silver from such fabrics; specifically, whether Ag(I), AgNPs, or a combination of both are released and the release rate of each species. It has been well documented that these variables change from product-to-product, depending on how the AgNPs were originally incorporated into the textile. The unpredictability of silver release, coupled with the increase in AgNP consumer products available every year, necessitate the development of cheap and efficient analytical methods to characterize silver release in order to better understand the potential environmental and biological implications of such release.<br/>Current techniques that analyze silver release from nano-enabled products are often expensive, require extensive sample preparation, and cannot simultaneously determine the amount of Ag(I) and AgNPs present. However, by coupling two inexpensive and efficient electrochemical techniques linear sweep stripping voltammetry (LSSV) and particle-impact voltammetry (PIV) to an orthogonal technique, UV-Vis spectroscopy, these issues can be addressed. Electrochemistry is an extremely powerful technique to analyze AgNPs in solution. In this work, we demonstrate that a novel technique (LSSV-PIV/UV-Vis) is able to simultaneously determine the concentrations of Ag(I) and AgNPs in the leachate of AgNP-impregnated textiles exposed to simulated sweat with comparable limits of detection to techniques currently used in the field.<br/>

Speciating Ag(I) and AgNPs in the leachate of AgNP-impregnated fibers

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.