Biosynthesis of silver nanoparticles using Saccharomyces cerevisiae

Figures & data

Figure 1. UV-Vis absorption spectrum of the colloidal silver produced. The spectrum was obtained 72 h after the start of AgNO₃ (1 mM) reduction using S. cerevisiae.

Figure 2. TEM micrographs of the NPs produced 72 h after the start of AgNO₃ (1 mM) reduction using dried commercially available S. cerevisiae- Magnification is 25,000.

Figure 3. TEM micrographs of the NPs produced 24 h after the start of AgNO₃ (1 mM) reduction using freshly cultured S. cerevisiae. Magnification is 4000, and the micrograph is focused on the NPs outside of the yeast, and the ones attached to the membrane.

Figure 4. TEM micrographs of the NPs produced 24 h after the start of AgNO₃ (1 mM) reduction using freshly cultured S. cerevisiae. Magnification is 25,000, and the micrograph is focused on the location of the NPs inside the yeast.

Figure 5. TEM micrographs of the NPs produced 5 h after the start of AgNO₃ (1 mM) reduction using freshly cultured S. cerevisiae. Magnification is 63,000, and the micrograph is focused on the corona or film around the NPs.

Figure 6. TEM micrographs of the NPs produced 24 h after the start of AgNO₃ (1 mM) reduction using freshly cultured S. cerevisiae. The micrograph is focused on the location of the NPs in the membrane, and the steps in the secretion of the NPs out of the yeast.

Figure 7. Particle size analysis of NPs produced after 48 h of biotransformation.

Figure 8. TEM micrographs of the NPs produced 24 h after the start of AgNO₃ (1 mM) reduction using freshly cultured S. cerevisiae. The micrograph is focused on disintegration of the yeast by NPs.