A fully inkjet-printed disposable gas sensor matrix with molecularly imprinted gas-selective materials

Abstract

A method was used to fabricate a fully inkjet-printed gas sensor matrix on photographic paper. An electrode matrix comprising 36 interdigital electrodes in a high-density layout that is easy to integrate has been fabricated using a combination of insulating ink and commercial silver ink. Molecular-imprinted polymer (MIP) inks were then made using a simple solution mixing method, and these inks were printed together with carbon black ink on the electrode matrix to complete production of the sensor. Finally, experimental dynamic sensing of volatile organic compounds verifies that for detection of gases corresponding to the MIP template molecules, the MIP layer offers improvements in both sensitivity and selectivity when compared with non-imprinted polymer layers. The matrix can produce a response of more than 20% to 3 ppm propenoic acid gas through adjustment of the printing times for the carbon black layer and the MIP layer.

Template Imprinting Versus Porogen Imprinting of Small Molecules: A Review of Molecularly Imprinted Polymers in Gas Sensing

“…Highly sensitive examples resulting from this method include the use of linear polyaniline in the preparation of a formaldehyde gas sensor yielding high selectivity and a detection limit of 30 ppb [ 45 ]. The number of successful examples of this technique being used in gas sensor preparation, with templates from simple carboxylic acids to organophosphates, is possibly disproportionate to the field [ 37 , 82 , 85 , 86 , 114 , 116 ].…”

Recent advances in inkjet-printing technologies for flexible/wearable electronics

“…77 With the advances in printing technology, multiple functional material-based gas sensors with optimized structural designs have paved the way in this area. 77,116–121…”

Study of Single and Multipass f–rGO Inkjet-Printed Structures with Various Concentrations: Electrical and Thermal Evaluation

“…[ 5 , 6 , 7 ], with low material consumption and almost zero waste [ 8 ]. It is effective for the fabrication of a variety of complex electronic components and devices such as: sensors (gas [ 9 , 10 ], temperature [ 11 , 12 , 13 , 14 ], and humidity [ 14 , 15 ]), microheaters [ 16 , 17 , 18 ], energy harvesters, capacitors, FETs, etc. [ 19 , 20 , 21 , 22 ].…”