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  • Biocide activity of diatom-silver nanocomposites. M. Suárez, L. Esteban-Tejeda, F. Malpartida, A. Fernández, R. Torrecillas, JS. Moya. 2011

Biocide activity of diatom-silver nanocomposites. M. Suárez, L. Esteban-Tejeda, F. Malpartida, A. Fernández, R. Torrecillas, JS. Moya. 2011

Materials Letters, Volume 64, Issue 19, Pages 2122-2125, 2010http://www.sciencedirect.com/science/article/pii/S0167577X10005252

Diatom-nAg composites containing 1 wt.% of metallic silver nanoparticles (≤ 20 nm) have been obtained by a colloidal route and chemical reduction. This nanostructured powder has proved to be a selective green inorganic biocide which reduces the starting concentrations of Escherichia coli and Micrococcus luteus cultures by at least 5 orders of magnitude, while completely inactive against yeast. Diatom-nAg can be considered as a selective inorganic biocide particularly suitable for the food and pharmacological sectors. The silver nanoparticles are released from the diatom surface to the liquid media in a controlled manner, reaching a concentration (< 11 ppm) far below the toxicity limit for human cells.

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