Table 1. Formulation composition and its size and zeta potential values before and after radiation; data are reported as mean ± standard deviation (n = 3).

Formulation code	Irradiation (kGy)	e PdI	Z-average (nm)	Peak-1		Peak-2		Zeta potential (mV)
				Size (nm)	Intensity (%)	Size (nm)	Intensity (%)
a F1	0	0.83 ± 0.06	886 ± 28	411 ± 21	85 ± 0.3	66 ± 11	16 ± 0.9	-36 ± 2.1
	1	0.63 ± 0.05	584 ± 41	424 ± 26	63 ± 0.5	4234 ± 21	35 ± 2.7	-31 ± 1.8
	3	0.54 ± 0.04	529 ± 39	207 ± 28	59 ± 0.4	4300 ± 28	39 ± 3.5	-22 ± 1.2
	5	0.64 ± 0.07	886 ± 26	318 ± 31	61 ± 2.6	4602 ± 32	37 ± 2.2	-32 ± 1.9
	7	0.68 ± 0.05	930 ± 23	532 ± 39	55 ± 0.3	4850 ± 24	36 ± 2.1	-30 ± 2.3
b F2	0	1.12 ± 0.09	870 ± 33	429 ± 37	63 ± 0.8	45 ± 12	24 ± 0.9	-35 ± 2.7
	1	0.66 ± 0.08	653 ± 41	469 ± 41	75 ± 0.2	5316 ± 24	23 ± 1.8	-33 ± 2.6
	3	0.59 ± 0.06	618 ± 24	270 ± 36	59 ± 0.9	3905 ± 31	44 ± 3.4	-34 ± 2.9
	5	0.81 ± 0.08	621 ± 12	378 ± 28	54 ± 0.9	4852 ± 41	39 ± 2.6	-34 ± 3.4
	7	0.89 ± 0.09	661 ± 27	558 ± 31	57 ± 0.7	5461 ± 34	41 ± 3.2	-33 ± 1.4
c F3	0	0.67 ± 0.07	768 ± 19	480 ± 42	85 ± 1.1	62 ± 14	14 ± 0.9	-37 ± 3.8
	1	0.55 ± 0.06	553 ± 32	263 ± 39	74 ± 0.4	5101 ± 27	22 ± 1.2	-32 ± 3.1
	3	0.41 ± 0.04	492 ± 26	268 ± 29	66 ± 1.2	4041 ± 36	31 ± 2.8	-30 ± 1.9
	5	0.47 ± 0.05	536 ± 31	340 ± 42	51 ± 1.6	3757 ± 38	39 ± 2.9	-35 ± 2.6
	7	0.55 ± 0.06	561 ± 42	385 ± 39	56 ± 0.9	4324 ± 29	42 ± 3.4	-29 ± 2.1
d F4	0	0.71 ± 0.07	781 ± 34	519 ± 28	85 ±1.3	69 ± 10	11 ± 0.6	-36 ± 2.8
	1	0.61 ± 0.06	567 ± 26	243 ± 19	75 ± 1.7	5242 ± 22	23 ± 1.1	-34 ± 3.2
	3	0.55 ± 0.06	446 ± 35	178 ± 21	74 ± 0.5	5201 ± 27	21 ± 1.6	-29 ± 2.7
	5	0.58 ± 0.06	487 ± 22	310 ± 33	72 ± 1.6	5001 ± 19	28 ± 1.3	-29 ± 3.1
	7	0.57 ± 0.06	510 ± 31	379 ± 31	67 ± 0.8	4631 ± 23	31 ± 2.6	-30 ± 3.1

^a F1: Polyacrylamide (PAAm):Polyacrylic acid (PAAc) - 1:1 (w:w), ^b F2: PAAm: PAAc –1:0.8 (w:w), ^c F3: PAAm: PAAc – 0.8:1 (w:w), ^d F4: PAAm: PAAc – 0.6:1 (w:w), ^e Polydispersity index