Solid-Phase Immunoassay of Polystyrene-Encapsulated Semiconductor Coreshells for Cardiac Marker Detection

Table 2

XPS analysis of PS-COOH nanoparticles.

PS-COOH	[C1s] atomic %	[O1s] atomic %	[O1s]/[C1s]	CCOOH /CTotal
PS-COOH #1	83.5	16.4	0.20	0.117
PS-COOH #2	87.8	11.9	0.14	0.070
PS-COOH #3*	77.9	21.9	0.28	0.096
PS-COOH #4*	78.4	21.5	0.27	0.125

*Two-step emulsion polymerization.