Table 1.

TEM- and PCS-derived mean size distributions of gold colloids synthesized using different OH extract volumes

Volume of extract (mL)	TEM, mean size ± SD (nm)	PCS size (nm)	PCS-derived PDI
0.25	72.9±44.22	74.82	0.48
0.5	56.83±22.81	64.41	0.42
1	36.75±16.82	42.22	0.52

Abbreviations: TEM, transmission electron microscopy; PCS, photon correlation spectroscopy; OH, Origanum herba; SD, standard deviation; PDI, polydispersity index.