3D Layer-By-Layer Pd-Containing Nanocomposite Platforms for Enhancing the Performance of Hydrogen Sensors

Authors:
Publisher website
Google Scholar
Abstract
Herein, a nanowelding technique is adopted to fabricate three-dimensional layer-by-layer Pd-containing nanocomposite structures with special properties. Nanowires fabricated from noble metals (Pd, Pt, Au, and Ag) were used to prepare Pd–Pd nanostructures and Pd–Au, Pd–Pt, Pd–Ag, and Pd–Pt–Au nanocomposite structures by controlling the welding temperature. The recrystallization behavior of the welded composite materials was observed and analyzed. In addition, the excellent mechanical and electrical properties were confirmed by performing 10,000 bending test cycles and measuring the resistances. Last, flexible and wearable nanoheaters and gas sensors were fabricated using our proposed method. In comparison with conventional techniques, our proposed method can not only easily achieve large-area and flexible fabrication, but also improve the performance through the addition of catalyst metals. A gas sensor fabricated using the Pd-Au nanocomposites demonstrated a 3.9-fold and 1.1-fold faster H2 recovery and response, respectively, than a pure Pd-Pd gas sensor device. Moreover, the Pd-Ag nanocomposite exhibited a high sensitivity of 5.5% (better than that of other fabricated gas sensors) for a 1.6% H2 concentration. Therefore, we believe that the fabricated nanocomposites appear promising for wide applications in wearable gas sensors, flexible optical devices, and flexible catalytic devices.
Funding Information
  • Ministry of Science, ICT and Future Planning (2014M3A6B3063707)

This publication has 68 references indexed in Scilit: