Figure 3.

HNMR spectra of 0.4% gelatin solution and gelatin-Au colloid at room temperature. (1) 0.4% gelatin solution; (2) gelatin-Au colloid containing 0.4% gelatin and 0.02 M gold nanoparticles synthesized at 80°C; (3) gelatin-Au colloid containing 0.4% gelatin and 0.2 M gold nanoparticles synthesized at 80°C.

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