Table 3.

The average diameters of the gold nanoparticles (GNPs) obtained by dynamic light-scattering (DLS) and nanoparticle-tracking analysis (NTA) measurements of the four GNP samples

Extract source	Average diameter (nm) ± SD
	DLS		NTA
	Small-particle peak	Large-particle peak
LC	2.6±0.8	50±8	64±47
SO	4±1	72±16	84±46
PeG	6±3	78±30	75±35
PuG	34±18	312±46	127±57

Abbreviations: SD, standard deviation; LC, Lippia citrodora; SO, Salvia officinalis; PeG, Pelargonium graveolens; PuG, Punica granatum.