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Complex impedance spectroscopy is used to characterize carbon nanotube (CNT) based gas sensors under the exposure of different concentrations of NH3 (10 ppm, 25 ppm, 50 ppm and 100 ppm). The characterization is performed in a frequency range between 20 Hz and 2 MHz. The frequency response of the CNT film showed high dependence on the film resistance. The variation in the normalized response of the...
A significant step toward commercialization of novel carbon nanotube (CNT) electronics involves the development of large area and high-throughput processes for the fabrication of high-quality CNT films. In this study, we report CNT-based gas sensors with exceptionally high as well as rapid response to various test gases. Highly uniform CNT thin films, prepared using a reliable and reproducible low-cost...
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