Optimum temperature of polyaniline derivative-intercalation into MoO₃ interlayers for development of their gas-sensing responses

Abstract

Volatile organic compound (VOC) gas sensing properties of the layered organic-inorganic hybrids of semiconductive molybdenum trioxide (MoO₃) thin films with polyaniline derivatives, e.g. poly(5,6,7,8-tetrahydro-1-naphthylamine) (PTHNA), has been investigated. The (PTHNA)_xMoO₃ thin films can detect dozen ppb level of HCHO and CH₃CHO gases. It seems that the resistive responses to aldehyde gases on the (PTHNA)_xMoO₃ tend to be affected by intercalation temperatures during PTHNA-intercalation into MoO₃ interlayers. In this presentation, the optimum intercalation temperature is revealed by HCHO-sensing property measurement and XPS analysis.