EDS data of Fig. 3							
							
Element line	Int. Cps/nA	Source	K-Ratio	Weight %	Weight % Error	Atom %	Atom % Error
C K	185.689	EDS	0.93C	70.45	 0.34	73.55	 0.35
N K	8.845	EDS	0.07C	29.55	 0.75	26.45	 0.68
Total				100		100	
