Figure 1S. The stability of gold nanoparticles with nominal diameters 4 nm and 20 nm stored in citrate buffer (pH 6.0) for 12 h was monitored by measuring the surface plasmon resonance bands centered at ca. 517 nm and 530 nm, respectively

From

Tuning the Size of Gold Nanoparticles with Repetitive Oxidation-reduction Cycles

Steve Y. Rhieu, Vytas Reipa

American Journal of Nanomaterials. 2015, 3(1), 15-21 doi:10.12691/ajn-3-1-2