期刊
MATERIALS LETTERS
卷 64, 期 19, 页码 2122-2125出版社
ELSEVIER
DOI: 10.1016/j.matlet.2010.06.061
关键词
Composite materials; Doping; Silica; Silver; Nanoparticles; Antimicrobial
资金
- Spanish Project [BIO2008-03683]
- ITMA-CISC [20091053]
- [PC07-21]
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. (C) 2010 Elsevier B.V. All rights reserved.
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