Table 1.

Parameters showing binding energy (eV), chemical bonds, FWHM (eV), and relative percentage concentration of spectral components of the deconvoluted C1s peaks

Sample	Binding energy (eV)	Bond assignment	FWHM (eV)	Relative concentration (%)
GR	284.5	C-C/C=C	0.98	75.50
	285.6	C-OH	2.12	16.43
	289.4	π-π*	5.01	8.02
CL-graphene	284.4	C-C/C=C	1.32	58.76
	285.7	C-OH/C-O	1.88	24.10
	288.2	C=O/C-NH	1.46	17.14

Abbreviations: GR, graphite; CL, collagen; FWHM, full width at half maximum.