Credit: McMaster University
A) Making paper sensors using a regular irkjet printer with cartridge containing DNA-based bio-irk. B) The paper sensor is simple to use – add a droplet of test sample and look for the right text to show up. (C) A real sensor designed to detect two biomarkers, ATP ( a small-molecule biomarker for abcteria) and PDGF (a protein biomarker for cancer). “A” lights up when ATP is present and “P” lights up when the test sample has PDGF.