Table 1. XPS Results of Functional Optic Fiber Probes.

functional optic fiber probe	percent of element/binding energy	C1s	O1s	Si2p	N1s
fiber A	atom/%	15.72	58.04	26.24	0
	B.E./eV	284.71	530.75	101.56	NAa
fiber B	atom/%	16.12	57.73	26.17	0
	B.E./eV	284.82	530.87	101.62	NAa
fiber C	atom/%	26.17	49.59	23.26	0.46
	B.E./eV	284.70	530.80	101.60	398.70
fiber D	atom/%	51.73	30.07	15.79	2.25
	B.E./eV	284.67	530.78	101.53	398.82

^aNA: no absorption was detected.