Table 3.

Impact of pH on SG-CViL Silica Sol Particle Size Dynamics

pH	Particle size distribution	Initial particle sizea	Final particle size	Particle growth rate (nm/min)b	Particle size increase (%)
6.4	bimodal (42 min)c	94.8 ± 11.0 (15 min)	143.3 ± 1.88 (66 min) 1,225.3 ± 180.2 (66 min)	6.01 (15–42) 24.95 (42–66) −3.89 (42–66)d	1,292
7.4	monomodal	59.3 ± 3.44 (6 min)	255.7 ± 78.2 (90 min)	2.03	431
8.4	monomodal	59.4 ± 8.56 (12 min)	156.2 ± 23.3 (90 min)	1.29	262
9.8	monomodal	48.4 ± 2.41 (39 min)	68.1 ± 2.24 (90 min)	0.42	142

^aNumbers in parenthesis indicate aging time when particles become measurable using DLS.

^bBest fit lines and R²-values reported in the Supporting Information (Figure S1).

^cAging time when PSD becomes bimodal

^dThe numbers in parenthesis indicate the aging time interval (in min.) for which the particle growth rate is calculated. The first growth rate is associated with the particle population before transition to a bimodal distribution. The second growth rate is associated with the large particle population of the bimodal particle distribution and the third (negative) growth rate is associated with the small particle population. See Figure S1 for explanation of negative growth curve