Table 1.

Effects of pH on the ZP of thiol-capped AuNPs

pH	TGA-AuNPs (mV)	MPA-AuNPs (mV)	l-cysteine-AuNPs (mV)	GSH-AuNPs (mV)	Cysteamine-AuNPs (mV)
3	−44.3 ± 11.4	−52.1 ± 8.9	−36.7 ± 10.5	−50.6 ± 14.6	+33.1 ± 8.1
5	−51.7 ± 13.4	−50.5 ± 8.6	−43.8 ± 10.2	−53.5 ± 10.3	+37.0 ± 8.0
7	−52.0 ± 11.5	−49.7 ± 16.4	−44.5 ± 8.9	−58.4 ± 15.8	+33.3 ± 6.8
9	−54.7 ± 13.9	−49.7 ± 14.0	−32.9 ± 12.4	−55.5 ± 11.0	−27.9 ± 7.9
11	–	–	–	–