通过功能化 Pt 纳米粒子显著增强 In2O3 纳米线的传感特性。

Significant enhancement of the sensing characteristics of In2O3 nanowires by functionalization with Pt nanoparticles.

机构信息

Division of Materials Science and Engineering, Inha University, Incheon, Republic of Korea.

出版信息

Nanotechnology. 2010 Oct 15;21(41):415502. doi: 10.1088/0957-4484/21/41/415502. Epub 2010 Sep 17.

PMID:20852351

Abstract

We report a significant enhancement in the gas sensing properties of In(2)O(3) nanowires by functionalizing their surfaces with Pt nanoparticles. For Pt-functionalization, In(2)O(3)-Pt core-shell nanowires are synthesized by the sputtering deposition of Pt layers on bare In(2)O(3) nanowires. Next, continuous Pt shell layers are transformed into Pt nanoparticles of cubic phase by heat treatment. In an O(2) gas sensing test, the Pt-functionalized In(2)O(3) nanowires reveal exceptionally higher sensitivity and faster response than bare In(2)O(3) nanowires.

摘要

我们通过在 In(2)O(3)纳米线表面功能化 Pt 纳米粒子，显著提高了 In(2)O(3)纳米线的气体传感性能。对于 Pt 功能化，通过在裸 In(2)O(3)纳米线上溅射沉积 Pt 层，合成了 In(2)O(3)-Pt 核壳纳米线。接下来，通过热处理将连续的 Pt 壳层转变为立方相的 Pt 纳米颗粒。在 O(2)气体传感测试中，Pt 功能化的 In(2)O(3)纳米线比裸 In(2)O(3)纳米线表现出异常高的灵敏度和更快的响应速度。