Fig. 1. (a) UV-vis absorption spectra and (b) wavelength at the maximum absorption (λmax) of silver colloid prepared in a 2 wt% aqueous PEG 100 solution at 80 °C as a function of reaction time. All absorption intensities were obtained with a three-fold dilution. The inset in (a) shows the UV-vis absorption spectra of individual PEG 100 and AgNO3 aqueous solutions.
