Caption: Ankit Agarwal, a postdoctoral researcher at the University of Wisconsin–Madison, is developing polymer films with silver nanoparticles for use in wound treatments. As shown in these 10x microscopic images, Agarwal found that a low dose of silver allows healthy growth of fibroblast cells (shown at left in green), but still manages to kill the bacteria present. Using a slightly higher dose of silver caused the fibroblast cells to die (shown at right in red), which slows the healing.
Photo: courtesy Ankit Agarwal/UW–Madison
Date: 2009
High-resolution JPEG