Room-temperature hydrogen sensor (IMAGE) RMIT University Caption The sensor is made with an electronic chip, which is covered with a thin layer of photonic crystals and then a titanium palladium composite. Credit RMIT University Usage Restrictions Credit RMIT University 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.