We have adopted a nanowelding technique to create three-dimensional layer-by-layer Pd-containing nanocomposite structures with unique properties. Using nanowires made from noble metals like Pd, Pt, Au, and Ag, we fabricated various Pd-based nanostructures and nanocomposites, including Pd–Pd, Pd–Au, Pd–Pt, Pd–Ag, and Pd–Pt–Au, by controlling the welding temperature. The recrystallization behavior of these composites was observed and analyzed. Their outstanding mechanical and electrical properties were confirmed through 10,000 bending test cycles and resistance measurements. We also fabricated flexible and wearable nanoheaters and gas sensors using our method. Compared to traditional techniques, our approach easily produces sensors with large surface areas and flexibility, enhancing their performance with catalyst metals. A gas sensor made with Pd–Au nanocomposites showed a 3.9-fold faster H2 recovery and a 1.1-fold faster response than a pure Pd–Pd gas sensor. Additionally, the Pd–Ag nanocomposite exhibited high sensitivity (5.5%) for a 1.6% H2 concentration. These findings suggest that our fabricated nanocomposites hold great promise for wearable gas sensors, flexible optical devices, and flexible catalytic devices. -Scientific Journal cover design by scapiens
[Scientific Journal cover design] Low-Thermal-Budget Fluorite-Structure Ferroelectrics for Future Electronic Device Applications
In article number 2100028, Jiyoung Kim, Si Joon Kim, and their team review key factors involved in developing fluorite-structure ferroelectrics
