Figure 4.

TEM results: a typical TEM image of colloidal Au nanoparticles (scale bar: 20 nm); b size distribution of colloidal Au nanoparticles (Av is the average particle size, and SD denotes the standard deviation of the size distribution); c high-resolution TEM image of the Au nanoparticle (scale bar: 5 nm); d EDX spectrum of Au nanoparticle

Liang et al. Nanoscale Research Letters 2009 5:124-129   doi:10.1007/s11671-009-9453-0