Figure 1 (IMAGE) Osaka University Caption Schematic of hydrogen sensing using palladium nanoparticles. Without hydrogen present, the metallic palladium nanoparticles (orange dots) act as isolated islands, and electric current cannot flow easily across the device. In contrast, when the device is exposed to even a small amount of hydrogen, the hydrogen atoms can bridge the gaps between islands, creating a connected network that allows a large current to pass though (red lines). Credit Osaka University 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.