Table 1. Size comparison of AuNPs from various devices (unit:nm).

Reducing Agent	*HR-TEM	AFM		FE-SEM	HR-TEM (Remeasurement)
		Diameter	Height
polygala tenuifolia extract	9.77 ± 3.09	198 ± 37.5	20.1 ± 7.06	—	—
vancomycin	11.0 ± 3.62	30.3 ± 3.83	10.8 ± 2.21	—	—
resveratrol	14.6 ± 2.97	65.9 ± 2.26	8.69 ± 2.08	—	40~50
gallotannin	15.9 ± 8.60	62.9 ± 6.57	9.29 ± 2.16	69.7 ± 6.57	—
ampicillin	18.7 ± 2.90	37.4 ± 6.74	9.97 ± 3.70	40.2 ± 4.59	—
chlorogenic acid	22.3 ± 4.78	52.0 ± 15.2	9.70 ± 5.31	59.4 ± 4.67	—