Figure 4.

The TEM images of gold nanotriangles synthesized by the reduction of 1 mM HAuCl₄ by endophytic A. clavatus (a–b). The inset in (b) shows the histogram analysis for edge-to-edge length of the gold nanotriangles. The different types of edge/tip margins of gold nanotriangles were observed such as sharp-edged triangles (e, h), truncated triangles (c, f, g) and snipped triangles (d), (bar represent 100 nm for a and b, while 50 nm for c–h).