Figure 1.

a TEM image of gelatin; b TEM image of AuNPs (dark dots) loaded by gelatin (gray plates) synthesized at 80°C (Cgelatin: 0.4%); c The magnified TEM images of b; d UV–vis of the Gelatin-AuNPs synthesized with 0.1, 0.15, 0.25, 0.5, 0.75, 1, and 2% gelatin solutions. The inset is the corresponding optical images of gelatin-AuNPs colloids (the gelatin concentration increasing from left to right).

Liu et al. Nanoscale Res Lett 2011 6:22   doi:10.1007/s11671-010-9756-1