Table 2: Summary of sensing performance of polymer functionalized CNT sensors. (Note: N/S = Not-stated.)

polymerCNT typeSensor configurationTargeted analytesDetection limitResponse timeRecovery timeReference

PEI, Nafion SWCNTsFETNO2, NH3100 ppb NO2 1-2 minN/S[36]
PABS SWCNTsResistorNH3, NO2, H2O20 ppb NO2, 100 ppb NH31–10 minSeveral hours[38]
PPyS-SWCNTFETNO2, NH3100 ppm NO2, 5 ppm NH3N/SN/S[40]
PDPAMWCNTsElectrochemical gas sensorCO0.01 ppm 2 s 3 s[41]
PMMAMWCNTsResistordichloromethane, chloroform, acetoneN/S2–5 s 10 s[42]
Poly(3-methylthiophene)MWCNTsResistorCH2Cl2, CHCl3, CCl4, CH4N/S60 s30–45 s[43]
polystyreneMWCNTsResistorthe good solvents of PSN/S 4 min 1 min[44]
PEGMWCNTsResistorchloroformN/S 1 sN/S[45]
POASACNTsResistorHCl100 ppmN/SN/S[46]
poly(vinylacetate), polyisoprene, etc.ACNTsResistorEthanol cyclohexane, tetrahydrofuranN/S 2 min 2 min[47]