Abstract
We investigated the influence of water adsorption on a CNT thin film. When we assumed that the magnitude of the change in electrical resistance was correlated with the surface coverage of the adsorbed molecules, this phenomenon could be explained by two-layer adsorption. The first layer was expressed by Langmuir adsorption and that on the second layer was expressed by Fowler–Guggenheim adsorption, which was derived by Bragg–Williams approximation and involved a lateral molecular interaction. The adsorption energy estimated by this assumption was on the same order as derived by DFT calculation.
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