Department of Chemistry, Chinese Culture University, Taipei 111, Taiwan.
Anal Methods. 2020 Jul 16;12(27):3537-3544. doi: 10.1039/d0ay00834f.
A single-yarn H2-gas sensor was fabricated by self-assembling poly(allylamine hydrochloride) (PAH), poly(styrenesulfonic acid) sodium salt (PSS), graphene oxide (GO) and Pd-based complex thin films layer-by-layer on a single-yarn and then in situ reducing the Pd-based complex to a Pd/GO/PAH/PSS/PAH multilayered thin film. The H2-gas sensing properties, effect of bending and humidity influence on this sensor were investigated. The sensor exhibited a high response and good linearity over the range of 1000 to 10 000 ppm of H2 gas. The response of the sensor decreased under both conditions of a bending angle up to 20° and ambient humidity above 50% RH. A fast Fourier transform (FFT) analyzer was employed to disperse the signals of the sensor under the conditions of bending and ambient humidity influence in the presence of H2 gas. Differentiation of the amplitude of FFT from the first-order to second-order frequency spectra effectively increased the discrimination capability of the sensor under the conditions of bending and humidity influence.
单纤维 H2 气敏传感器是通过将聚(盐酸烯丙胺)（PAH）、聚苯乙烯磺酸钠（PSS）、氧化石墨烯（GO）和基于 Pd 的配合物薄膜层层自组装在单纤维上，然后原位还原基于 Pd 的配合物来制备的。研究了该传感器对 H2 气体的传感性能、弯曲和湿度影响。该传感器在 1000 至 10000 ppm H2 气体范围内表现出高响应和良好的线性度。在弯曲角度高达 20°和环境湿度高于 50%RH 的条件下，传感器的响应均下降。快速傅里叶变换（FFT）分析仪用于在存在 H2 气体的情况下分散传感器在弯曲和环境湿度影响下的信号。从一阶到二阶频谱的 FFT 幅度的差异有效地提高了传感器在弯曲和湿度影响下的区分能力。
