Fig. 6.

HR-TEM images of gold nanorods. The scale bars represent a 100 nm, b 200 nm, and c 5 nm. d A schematic representation of nanorods with an average length and width of 60.4 nm and 16.4 nm, respectively. Image a was obtained without chitosan capping, and b and c were obtained with chitosan capping. The distance between neighboring lattices was measured to be 0.23 nm. Red arrows indicate the chitosan layer after capping