Design of interpenetrated network MWCNT/poly(1,5-DAN) on interdigital electrode: Toward NO2 gas sensing

In this paper, poly(1,5-diaminonaphthalene) was interpenetrated into the network made of multiwalled carbon nanotubes (MWCNT) on platinum interdigital electrode (IDE) by electro-polymerization of 1,5-diaminonaphthalene (1,5-DAN). The electro-polymerization process of 1,5-DAN on MWCNT was controlled by scanning the cyclic voltage at 50mVs−1 scan rate between −0.1V and +0.95V vs. saturated calomel electrode (SCE). The results of voltammetric responses and Raman spectroscopy represented that the films MWCNT/poly(1,5-DAN) were successfully created by this polymerization process. The films MWCNT/poly(1,5-DAN) were investigated for gas-sensing to NO2 at low concentration level. The gas-sensing results showed that the response–recovery times were long and strongly affected by thickness of the film MWCNT/poly(1,5-DAN). Nevertheless, these films represented auspicious results for gas sensors operating at room temperature. •1,5-diaminonaphthalene was electropolymerized on multiwalled carbon nanotubes (MWCNT )/platinum interdigital electrode (IDE).•The voltammetric responses and Raman spectroscopy represented that the films poly(1,5-DAN) were successfully created on the MWCNT/IDE.•The films MWCNT/poly(1,5-DAN) revealed auspicious sensing characteristics to NO2 for gas sensors operating at room temperature.