System with Carbon Nanotubes (IMAGE) Spanish Foundation for Science and Technology Caption Within the system with carbon nanotubes, the aptamers (red) bind to the bacteria (green), which activates a measurable electrical signal that reveals the presence of the pathogen. Credit Chemometrics Research Group, and Nanosensors Qualimetrics of the URV Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.