Table 2.

Central composite design matrix and response values obtained for the synthesis of SeNPs.

Run	Time (min)	Power (W)	Na2SeO3 (g)	Average Crystalline Size (nm) *	Z-Potential (mV) **
1	10.0	600.0	0.275	53.1	−19.27
2	15.0	400.0	0.150	43.8	−33.60
3	1.6	600.0	0.275	46.9	−26.07
4	10.0	263.6	0.275	48.5	−24.67
5	10.0	600.0	0.065	48.9	−31.67
6	18.4	600.0	0.275	46.5	−25.63
7	15.0	800.0	0.150	40.9	−36.47
8	10.0	600.0	0.275	45.9	−14.57
9	5.0	800.0	0.150	43.4	−28.53
10	10.0	600.0	0.275	49.9	−18.50
11	10.0	600.0	0.275	47.5	−15.67
12	5.0	800.0	0.400	58.9	−25.03
13	15.0	400.0	0.400	66.6	−25.70
14	5.0	400.0	0.400	58.0	−27.30
15	10.0	600.0	0.275	48.6	−14.77
16	10.0	600.0	0.275	51.5	−14.73
17	10.0	936.4	0.275	45.6	−26.97
18	15.0	800.0	0.400	58.1	−26.77
19	5.0	400.0	0.150	43.8	−22.27
20	10.0	600.0	0.275	49.1	−16.30
21	10.0	600.0	0.485	66.2	−22.50
22	10.0	600.0	0.275	49.2	−17.90
23	10.0	600.0	0.275	48.9	−15.13

* Determined by X-ray diffraction (XRD) using the Debye–Scherrer equation; ** Determined by dynamic light scattering (DLS).