Printing Paper Sensors

Apr-12-15 A new inkjet technology that uses bio-ink to print paper sensors could offer a cost-effective way to identify food contaminates or disease in real-time.

The paper-based sensors are built on earlier research by a team at McMaster University, who developed a paper-based sensor for E.coli in 2012. However, that sensor was limited to detecting E.coli only.

The new sensors, from the same team, have been equipped with man-made DNA molecules (DNA apatamers) that can bind to almost any target, including proteins and cells—allowing the sensors to detect a much wider range of bacteria. In addition, the new sensors are made using a simpler "ink composition," which enables them to be printed using a standard inkjet printer and makes the technology much easier to scale up.

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