Table 1.

The concentration of gallium ion in different samples of Ga@C-dots, as measured by ICP-OES and the zeta potentials on their surface

Samples	Ga amount during synthesis (mg)	Measured (Ga) in the product (µg/mL)	Zeta potential (mV)
Pristine C-dots	–	0	−20.3
Ga@C-dots	70	26	+16.7
Ga@C-dots	175	55	+19.5
Ga@C-dots	350	330	+26.1
Ga@C-dots	700	350	+29.2

Abbreviation: ICP-OES, inductively coupled plasma optical emission spectroscopy.