Table 1.

XPS analysis showing different percentages of bonding groups in PEG₆₀₀₀/CD sample.

Synthesized Sample	Element Ratio (mol %)
C 1s peak
C–C	14.8
C–N	20.7
C–OH	55.0
O–C=O	9.5
N 1s peak
Quaternary N	54.3
Pyrrolic/Pyridinic N	45.7
O 1s peak
C=O	21.6
C–O	78.4