Table 1.

Weight and molar ratio of ZnO and coating agents

Samples	Coating agent		HEPES
	Weight (g)	Molar ratio (mol)	Weight (g)	Molar ratio (mol)
ZnOSM20(−)	0.05	1.38 × 10−2	0.02	8.13 × 10−3
ZnOSM20(+)	0.05	3.87 × 10−2
ZnOAE100(−)	0.05	1.38 × 10−2
ZnOAE100(+)	0.05	3.87 × 10−2

Note: Weight (g) and molar numbers (mol) correspond to 1.00 g or 1.00 mol of ZnO.

Abbreviation: HEPES, 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid.