The sensing performance was further characterized at different relative humidities (RH) (Figure ). Naturally, polar LP-NC surfaces show a high affinity to adsorption of H2O. Although LPO2-Ade38090/Glu30010 shows a very strong and fast response to H2O (up to 50% in RH=100%, Figure ), a stable selective response to CO2 even at such high relative humidity levels is detectable (Figure ). For example, in the range of RH of 40-80%, the response increases from ΔR/R0 = 0.25 to 0.53% (Figure ).