High-performance Carbon Nanotubes Hydrogen Gas<sub> </sub>sensor by Separation of Carbon Nanotubes
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초록
내용
In hydrogen-based industries, the implementation of a hydrogen (H2) gas sensor becomes essential for precise control of H2 concentrations due to its flammability and potential for explosions. Among the many H2-detecting materials, semiconducting-carbon nanotubes (sc-CNTs) offer distinctive advantages in gas sensors thanks to their specific surface area and porosity. However, it is challenging to selectively separate sc-CNTs from the mixture with metallic-CNTs which limits the sensitivity and selectivity of the sensor. Here, we present the high-performance H2 sensor by separating sc-CNTs with high purity through the wrapping polymer. The adsorption of H2 molecules onto polymer-wrapped sc-CNTs induces electron transfer that causes a change in the electrical conductivity of the CNTs, resulting in heightened sensitivity and selectivity. The development of the sensor is a significant step forward in enhancing safety measures and process control in hydrogen-based industries.