Table 1.

Fmoc–F–F (His) and Fmoc–F–F XPS C 1s peak splitting results statistics

Functional groups types	Fmoc–F–F (His) (%)	Fmoc–F–F (%)
C=C	62.15	75.98
C–N	26.94	13.9
C=O	2.66	4.56
π–π	1.11	3.22
C–O	7.14	2.34