Abstract
EHD printing of discrete conducting polymer arrays, bridging the electrodes for highly sensitive chemiresistive gas sensors.
Highlights
Electrohydrodynamic Jet Printing (EHD) enables the printing of sub-micron structures using a wide variety of materials and substrates, comparing favorably to many current additive manufacturing techniques
We have shown that using discrete printed arrays of polyaniline can result in higher sensitivity and better performing sensing, with the sensing of 200 ppb of ammonia gas using camphorsulfonic acid (CSA) doped and co-doped polyaniline
Our results corroborate the known influence of dopant acid on the overall polyaniline conductivity and morphology and illustrates for the first time how these factors influence sensing and printability
Summary
Electrohydrodynamic Jet Printing (EHD) enables the printing of sub-micron structures using a wide variety of materials and substrates, comparing favorably to many current additive manufacturing techniques. Hydrochloric acid (HCl), camphorsulfonic acid (CSA) and mixture of both these acids (co-doped) were used to make the polyaniline conductive (Fig. S1, ESI†). The differently doped films on glass substrates yielded incoherent sensing results.
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