Table 1.

Initial XPS atomic percentages of CdSe/CdS/ZnS and CdSe/CdS/ZnS-PMAT QDs indicate the decrease of the cores elements after PMAT encapsulation. The initial XPS atomic percentages assume a homogeneous distribution of elements in the QDs. Corrected XPS atomic percentages, which account for the core-shell-shell distribution of elements in the QDs, of CdSe/CdS/ZnS-PMAT QDs were used to estimate that ~15 PMAT molecules were attached to each QD.

	at%
	Initial XPS atomic percentages		Corrected XPS atomic percentages CdSe/CdS/ZnS-PMAT QDs elements
Element	CdSe/CdS/ZnS	CdSe/CdS/ZnS-PMAT
C 1s	83.4±2.1	49.1±2.1	80
O 1s	5.7±0.9	33.2±0.6
Cd 3d	5.6±0.7	1.5±0.1	17
Se 3d	0.9±0.1	0.16±0.01	3
P 2p	0.6±0.1	traces
Zn 2p3	0.08±0.02	traces
S 2s	1.2±0.4	traces
F 1s	2.5±1.6	---
Na 1s	---	5.3±0.3
Cl 2p	---	0.6±0.08
B1s	---	9.8±1.4
Cd/Se	6.2	9.4	5.6