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. Author manuscript; available in PMC: 2013 May 30.
Published in final edited form as: Adv Funct Mater. 2010 Dec 21;20(24):4250–4257. doi: 10.1002/adfm.201000985

Figure 2.

Figure 2

The E. coli fluorescence monitored at 37 °C in the absence (stars) and presence of pure SiO2 (hexagons) and nanosilver coated by 1.4 (squares), 1.9 (triangles), 7.8 (circles) and 9.5 wt% SiO2 (diamonds). The SiO2-coating does not inhibit E. coli growth. For a decreasing SiO2-content, however, significant E. coli growth inhibition is observed indicating the exposure of nanosilver surface to E. coli. Coating nanosilver, however, with 7.8 and 9.5 wt% SiO2 blocks its toxicity resulting in nanosilver that can be used as plasmonic biosensor.