Abstract
Single Bi2S3 nanowire devices were fabricated using the focused ion beam technique to deposit Pt electrodes. Repeatable and reliable ohmic contacts were obtained. The devices exhibit outstanding H2 sensing performance that can detect H2 (in N2) at room temperature with a sensitivity of 22% at 10 ppm (corresponds to 4.0 × 10−7 mol/L). Decorating Pd nanoparticles on the surface of the nanowire does not improve the sensing performance, contrary to most of the existing nanowire (or nanotube) H2 sensors. The sensing mechanism of Bi2S3 nanowire devices is found to be different from that of other sensors based on nanowires or nanotubes. Experiments on different H2 concentrations and gas pressures suggest that the sensing response is determined mainly by the amount of H2 molecules instead of the proportion of H2 in the mixed gas.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
