Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, P. R. China.
Adv Mater. 2014 Sep 10;26(34):5962-8. doi: 10.1002/adma.201401597. Epub 2014 Jul 10.
The palladium nanoparticle (Pd NP)-decorated LaAlO3 /SrTiO3 (LAO/STO) heterostructure is for the first time used as a hydrogen-gas sensor with very high sensitivity and workability at room temperature. The outstanding gas-sensing properties are due to the Pd NPs' catalytic effect to different gases, resulting in charge coupling between the gas molecules and the two-dimensional electron gas (2DEG) through the Pd NPs by either a direct charge exchange or a change of the electron affinity. These results provide insight into the emerging properties at LAO/STO interfaces.
钯纳米粒子（Pd NP）修饰的 LaAlO3/SrTiO3（LAO/STO）异质结构首次被用作室温下具有高灵敏度和可操作性的氢气传感器。优异的气体传感性能归因于 Pd NPs 对不同气体的催化作用，通过 Pd NPs 直接电荷交换或电子亲和性的变化，导致气体分子与二维电子气（2DEG）之间的电荷耦合。这些结果深入了解了 LAO/STO 界面的新兴特性。
