XPS data of C 1s, O 1s, and N 1s core level of NOMCs.

Samples	NOMC-L		NOMC-L-0.5		NOMC-L-1
	B.E.	at%	B.E.	at%	B.E.	at%
C1	284.8	43.50	284.5	43.90	284.6	44.27
C2	284.9	35.62	284.9	28.23	285.4	25.66
C3	286.1	9.20	285.4	13.89	286.6	15.26
C4	288.9	11.68	287.4	13.98	289.7	14.81
O1	531.6	29.48	531.3	32.38	531.7	37.15
O2	532.6	35.07	532.6	36.64	532.9	37.55
O3	533.7	35.45	533.6	30.98	533.8	25.30
N-6	398.5	24.60	398.5	30.46	398.5	33.52
N-5	400.1	22.53	400.6	24.52	400.6	27.89
N-Q	401.1	27.43	401.2	25.38	401.1	23.34
N-X	402.1	25.44	403.6	19.64	402.4	15.24