Pd–Ni hydrogen sponge for highly sensitive nanogap-based hydrogen sensors
Abstract(#br)We have successfully fabricated sub-100 nm nanogaps in Pd–Ni alloy thin films on an elastomeric substrate by simple stretching. The nanogaps-containing Pd–Ni films were utilized as hydrogen-sensing sponges and their performance was demonstrated to dominate over the performance of similar mobile thin films comprised of pure Pd in major aspects such as the response time, sensitivity in high H 2 concentrations, and H 2 detection limit.