Table 4.

Comparison of the responses of P3HT-based receptor structures to NO₂.

Material	NO2 Concentration	Response	Operating Temperature	Reference
PEGSil H	1 ppm	1330% 605% 1980%	RT 50 °C 100 °C	Current work
rrP3HT	5 ppm	188%	50 °C	[18]
P3HT	5 ppm	11% *	RT	[33]
Poly(methylsiloxane)-graft-poly(3-hexylthiophe)-graft-poly(ethylene glycol)	5 ppm	2300%	50 °C	[18]
(P3HT) ZnO@GO hybrid	5 ppm	210%	50 °C	[37]
P3HT/ZnO NS-NR composite	4 ppm	60% *	RT	[38]
RGO-P3HT composite	4 ppm	40% *	RT	[39]
P3HT:ZnO (ratio6:2) hybrid	5 ppm	20% *	RT	[40]
P3HT-SnO2composite	5 ppm	500%	100 °C	[41]
Poly-(bisdodecylquaterthiophene)	5 ppm	300% *	RT	[26]
poly-(bisdodecylthioquaterthiophene)	5 ppm	450% *	RT	[26]
P3HT:ZnO-nanowire composite	4 ppm	30% *	RT	[42]

* Response calculated as (R_a − R_g)/R_a or (I_a − I_g)/I_a.