Figure 3.

Average size of gold nanoparticles in DI water measured by a Zetasizer (blue points show the size of GNPs sonicated for 0, 30, and 45 min, and red points present the size of GNPs using a mixed magnetic stirring and ultrasonication of total 30 min).

Chen and Wen Nanoscale Research Letters 2011 6:198   doi:10.1186/1556-276X-6-198
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