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Highly Selective NO2 Gas Sensors Made of MWCNTs and WO3 Hybrid Layers, Espinosa, E. H., Ionescu, R., Llobet, E., Felten, A., Bittencourt, C., Sotter, E., Topalian, Z., Heszler, P., Granqvist, C. G., Pireaux, J. J., Correig, X.
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Espinosa et al. (2007) studied this question.
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