Abstract
Here we are reporting the printable nanoink of polyaniline (PANI) which can be printed over the flexible substrate. The printed patterns (flexible) are used for the detection of toxic ammonia gas. The conducting polymer polyaniline (PANI) is synthesized by the chemical oxidative polymerization of aniline. The synthesized PANI is characterized by FTIR, UV–visible, XRD, FESEM and TEM. The FESEM and TEM micrograph shows the formation nanotubes of the PANI having the average diameter of 10.85 nm and average length of 45.6 nm. The XRD analysis revealed the PANI is between amorphous nature and crystalline. The synthesized PANI has the optical energy band gap of 2.9 eV. The printed pattern of PANI has able to detect the lowest concentration of 2.5 ppm of ammonia gas. It has the sensing response of 75%, with response time of 110 s and recovery time of 55 s at 2.5 ppm concentration. The sensor has the sensitivity of 1.0036 ppm−1.
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