Sensitivity Enhancement of Benzene Sensor Using Ethyl Cellulose-Coated Surface-Functionalized Carbon Nanotubes

Table 1

The C 1s and O 1s components (%) of the pristine MWCNTs, A60-MWCNTs, P60-MWCNTs, and P90-MWCNTs.

Sample	Element ratio (%)		C 1s ratio (%)				O 1s ratio (%)
	C	O	C=C	C-C	C=O	-COOH	C=O	-COOH
Pristine MWCNTs	93.57	4.82	70.28	16.28	4.77	2.24	3.62	1.20
A60-MWCNTs	96.94	2.65	68.31	17.03	7.42	4.18	1.62	1.03
P60-MWCNTs	92.53	6.72	54.03	27.32	7.74	3.44	3.94	2.78
P90-MWCNTs	92.30	6.78	69.72	15.02	4.80	2.76	5.25	1.53