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Microbial synthesis of silver nanoparticles.

Microbial synthesis of silver nanoparticles.

Journal of nanoscience and nanotechnology (2013-07-19)

Yumi Kim, Byeong-Gweon Lee, Yul Roh

ABSTRACT

The objectives of this research were to study biogenic synthesis of Ag(0) nanoparticles and to determine the effects of various experimental conditions such as silver nitrate concentrations, pHs and temperatures controlling for the optimal biosynthesis of Ag(0) nanoparticles. The metal-reducing bacteria formed 5-15 nm-sized Ag(0) nanoparticles by reduction of 0.5-1 mM silver nitrate under the conditions around 15-25 degrees C and medium pH 7.5-8.5 within 3 days of incubation. These results not only show that the bacteria enzymatically reduced Ag(I), but also offer methods for microbial synthesis of homogeneous silver nanoparticles and silver recovery from the natural environments.

MATERIALS

Product Number

Brand

Product Description

Sigma-Aldrich

Silver, conductive paste

Sigma-Aldrich

Silver nanowires, diam. × L 50 nm × 6 μm, 0.5% (isopropyl alcohol suspension)

Sigma-Aldrich

Silver nanowires, diam. × L 100 nm × 6 μm, 0.5% (isopropyl alcohol suspension)

Sigma-Aldrich

Silver, colloidal, 65-75% Ag basis

Sigma-Aldrich

Silver, powder, <250 μm, 99.99% trace metals basis

Sigma-Aldrich

Silver, wool, diam. 0.05 mm, ≥99.9% trace metals basis

Sigma-Aldrich

Silver, foil, thickness 2.0 mm, 99.9% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 0.127 mm, 99.99% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 1.0 mm, ≥99.99% trace metals basis

Sigma-Aldrich

Silver, foil, thickness 1.0 mm, 99.99% trace metals basis

Sigma-Aldrich

Silver, foil, thickness 0.1 mm, 99.9% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 1.0 mm, 99.9% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 0.5 mm, ≥99.99% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 0.25 mm, 99.9% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 0.25 mm, ≥99.99% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 0.5 mm, 99.9% trace metals basis

Sigma-Aldrich

Silver, foil, thickness 0.25 mm, 99.9% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 2.0 mm, ≥99.99% trace metals basis

Sigma-Aldrich

Silver, granular, >250 μm, 99.99% trace metals basis

Sigma-Aldrich

Silver, wire, diam. 2.0 mm, 99.9% trace metals basis

Sigma-Aldrich

Silver, foil, thickness 0.025 mm, 99.9% trace metals basis