Single-Walled Carbon Nanotubes Modified with Pd Nanoparticles : Unique Building Blocks for High-Performance, Flexible Hydrogen Sensors

摘要: High-performance hydrogen sensors with excellent mechanical flexibility and durability have been fabricated on thin plastic sheets the use of high-quality semiconducting single-walled carbon nanotubes decorated discrete Pd nanoparticles. These exhibit sensing performance much higher than that traditional ones built precious pure palladium structures rigid substrates. For example, sensitivity typical flexible is in range 100−150% (based resistance change sensors) for 0.1% dry air at room temperature. The response times are typically less 15 s 1% hydrogen, can be completely recovered within 5 min without hydrogen. detect concentrations as low 100 ppm (0.01%). Experimental results indicate as-fabricated devices operate well even when they bent to a curved geometry bending radii down 2 mm after treated 1000 o...