TY - JOUR
T1 - Electrohydrodynamic jet printed conducting polymer for enhanced chemiresistive gas sensors
AU - Mkhize, Nhlakanipho
AU - Murugappan, Krishnan
AU - Castell, Martin R.
AU - Bhaskaran, Harish
N1 - Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2021/4/7
Y1 - 2021/4/7
N2 - Electrohydrodynamic Jet Printing (EHD) enables the printing of sub-micron structures using a wide variety of materials and substrates, thus comparing favorably to many current additive manufacturing techniques. By using EHD to print polyaniline based chemiresistors, we demonstrate ammonia gas sensors reaching a detection sensitivity of 2.5% ppm-1 (limit of detection = 0.2 ppm) on glass, and 6.9% ppm-1, (limit of detection = 0.7 ppm) on flexible substrates. We quantitatively compare the results obtained from printed sensors to those prepared with conventional dropcasting, and find significant improvement. Further, we report our findings on the role of the dopant acid in the polymer structure and sensing, as well as the processability of polyaniline for EHD with the use of advanced characterization techniques. This work validates the use of EHD for printed sensors on flexible substrates, laying the groundwork for further research and development into rapid production of a host of miniaturized flexible polymer sensors.
AB - Electrohydrodynamic Jet Printing (EHD) enables the printing of sub-micron structures using a wide variety of materials and substrates, thus comparing favorably to many current additive manufacturing techniques. By using EHD to print polyaniline based chemiresistors, we demonstrate ammonia gas sensors reaching a detection sensitivity of 2.5% ppm-1 (limit of detection = 0.2 ppm) on glass, and 6.9% ppm-1, (limit of detection = 0.7 ppm) on flexible substrates. We quantitatively compare the results obtained from printed sensors to those prepared with conventional dropcasting, and find significant improvement. Further, we report our findings on the role of the dopant acid in the polymer structure and sensing, as well as the processability of polyaniline for EHD with the use of advanced characterization techniques. This work validates the use of EHD for printed sensors on flexible substrates, laying the groundwork for further research and development into rapid production of a host of miniaturized flexible polymer sensors.
UR - http://www.scopus.com/inward/record.url?scp=85103837438&partnerID=8YFLogxK
U2 - 10.1039/d0tc05719c
DO - 10.1039/d0tc05719c
M3 - Article
SN - 2050-7526
VL - 9
SP - 4591
EP - 4596
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 13
ER -