UV-Vis absorption spectra of the AgNPs films prepared in AgNO3/BuNH2 ethanolic solutions at different reaction time. The reactants concentrations: (A) 1/0.5 mM, (B) 5/2.5 mM, and (C) 10/5 mM. The background spectra have been subtracted for all the UV-Vis absorption spectra.
Hao et al. Nanoscale Research Letters 2011 6:263 doi:10.1186/1556-276X-6-263