Host: The Ceramic Society of Japan
Characterizations of layered MoO3 host with interlayer polyaniline (PANI), i.e. (PANI)xMoO3, have been carried out by means of XRD, TG, solid-state NMR, and XPS analyses. The guest organic components, i.e. PANI, are accommodated into MoO3 interlayers by ion-exchange process. From these detailed characterization studies, it is found that the interlayer PANI chains have non-proton-doped units as well as proton-doped units. Moreover, the (PANI)xMoO3 hybrids have enough interlayer spaces due to almost perpendicular orientation of benzene ring into PANI chains to the MoO3 layer. The (PANI)xMoO3 hybrids as gas sensors have a resistance drift problem, which should be solved for realizing practical applicable gas sensing devices. In this XPS study, it is revealed that the resistance drift is caused by adsorbing and desorbing oxygen molecules from the atmosphere.
