Figure 5.

pH values of Au colloid dispersions obtained at different temperature versus NaOH concentration. The pH values before reaction were also involved and the inset photo shows Au colloids prepared at 70°C under the labeled alkaline concentration (millimolars).

Li et al. Nanoscale Research Letters 2011 6:440   doi:10.1186/1556-276X-6-440
Download authors' original image