College of Sciences, Northeastern University, Shenyang 110004, People's Republic of China.
Nanotechnology. 2011 May 27;22(21):215501. doi: 10.1088/0957-4484/22/21/215501. Epub 2011 Mar 30.
Pd-ZnO nanoflowers with high uniformity were prepared via a novel one-step hydrothermal route. High sensitivity, fast response, high selectivity and low work temperature are obtained from Pd-ZnO nanoflower sensors. The sensitivity upon exposure to 300 ppm ethanol is up to 168 at 300 °C and maintains 2.6 at 120 °C. Such behaviors can be attributed to Schottky contact at the Pd/ZnO interface and catalytic activity of Pd nanoparticles. The present results open a way for uniform surface modification of one-dimensional nanostructures with Pd nanoparticles and further enhancing their gas sensing performance.
通过一种新颖的一步水热法制备了具有高均匀性的 Pd-ZnO 纳米花。Pd-ZnO 纳米花传感器具有高灵敏度、快速响应、高选择性和低工作温度。在 300°C 下，对 300 ppm 乙醇的灵敏度高达 168，在 120°C 下保持 2.6。这种行为可以归因于 Pd/ZnO 界面处的肖特基接触和 Pd 纳米粒子的催化活性。本研究结果为一维纳米结构的 Pd 纳米粒子的均匀表面修饰开辟了道路，并进一步提高了它们的气体传感性能。
