Researchers at Sweden’s Chalmers University of Technology have developed the first hydrogen sensors ever to meet the future performance targets for use in hydrogen-powered vehicles. The device is capable of detecting 0.1 percent hydrogen in the air in less than a second. In a study published in the scientific journal Nature Materials, physicists Ferry Nugroho, Christoph Langhammer and other colleagues, explain that their optical nanosensor contains millions of metal nanoparticles of a palladium-gold alloy, a material that is known for its sponge-like ability to absorb large amounts of hydrogen. The device is also ... (full story)