CO2 Sensor (IMAGE) ETH Zurich Caption ETH researchers' miniature CO2 sensor is pictured: chip with a thin layer of the polymer-nanoparticle composite. Credit Fabio Bergamin / ETH Zurich 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.