A flexible hydrogen sensor based on Pd nanoparticles decorated ZnO nanorods grown on polyimide tape

作者：Rashid Tonny Roksana; Phan Duy Thach; Chung Gwiy Sang^*

来源：Sensors and Actuators B: Chemical , 2013, 185: 777-784.

DOI：10.1016/j.snb.2013.01.015

• Flexible sensor
• Hydrogen sensor
• ZnO nanorods
• Pd catalyst
• Polyimide tape

This paper describes the fabrication and characterization of flexible hydrogen sensors using ZnO nanorods (NRs) incorporated with a Pd catalyst for hydrogen detection at room temperature. The well-aligned, vertical ZnO NRs are grown on a polyimide tape substrate, and are successfully synthesized using an aqueous solution method. Pd nanoparticles approximately 10 nm in size were used as catalysts, and were deposited into a ZnO NR array network with RF magnetron sputtering. The resulting flexible hydrogen sensors showed a high performance with fast response, and excellent mechanical flexibility. Response factors of similar to 91% with good repeatability and stability were achieved for 1000 ppm hydrogen at room temperature, and the sensor limit of detection (LOD) was 0.2 ppm. Sensor performance did not significantly degrade, even when bent at a curvature angle of 90 degrees, and through 10(5) cycles to an angle of 90 degrees. Light weight, mechanically robust Pd nanoparticle-decorated ZnO NRs can be a promising building block for flexible hydrogen sensors, combining a fast response with stable performance.

• 出版日期2013-8