Fig. 2: Pd70Au30 alloy sensor deactivation by humidity in synthetic air at 30 °C.
From: Neural network enabled nanoplasmonic hydrogen sensors with 100 ppm limit of detection in humid air
a The ISO 26412:2010 hydrogen safety sensor test protocol in synthetic air at different relative humidities (RH). b Experimentally measured sensor λpeak response to the ISO 26412:2010 hydrogen safety sensor test protocol depicted in a). c Zoom-in on the core section of the ISO 26412:2010 hydrogen safety sensor test protocol. d Zoom-in on the corresponding sensor response in 0, 20, 50 and 80% RH at 30 °C to different H2 concentration pulses ranging from 0.06 to 1.3%. e Δλpeak as a function of H2 concentration, \({{{{{{\boldsymbol{c}}}}}}}_{{{{{{{\boldsymbol{H}}}}}}}_{{{{{{\boldsymbol{2}}}}}}}}\), for different RH values, revealing distinct deviation from Sieverts’ law for RH > 0. Error bars correspond to three times the standard data deviation, 3σ, containing both repetition and signal noise components – details in Supplementary Section 11; f LoD as a function of the relative humidity levels. LoD was calculated by signal interpolation at 3 times the noise level, as detailed in Supplementary Figs. 5–7.
