Na Han Gil, Kwon Yong Jung, Cho Hong Yeon, Kang Sung Yong, Kim Hyoun Woo
J Nanosci Nanotechnol. 2015 Nov;15(11):8571-6. doi: 10.1166/jnn.2015.11504.
We coated zinc-oxide (ZnO)-branched tin oxide (SnO2) nanowires with a Pt shell layer via a sputtering method and subsequently annealed the composite to generate Pt nanoparticles. The spillover effect of Pt nanoparticles was expected to play a significant role in enhancing the response. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy revealed that the nanoparticles were comprised of a cubic Pt phase. A sensing test with NO2 gas revealed that the sensor response to NO2 gas was significantly increased, being related to the spillover effect of the Pt nanoparticles. As a result of the Pt-functionalization, the sensor response time and recovery time were decreased and increased, respectively. The high sensor response and fast response time make Pt-functionalized ZnO branched nanowires a promising candidate for gas sensors. The present work will be useful in exploring new areas of multiple-component nanosystems.
我们通过溅射法在氧化锌（ZnO）分支的氧化锡（SnO₂）纳米线上包覆了一层铂壳层，随后对该复合材料进行退火处理以生成铂纳米颗粒。预计铂纳米颗粒的溢出效应在增强响应方面将发挥重要作用。X射线衍射、扫描电子显微镜和透射电子显微镜表明，这些纳米颗粒由立方铂相组成。对二氧化氮气体的传感测试表明，该传感器对二氧化氮气体的响应显著增加，这与铂纳米颗粒的溢出效应有关。由于铂功能化，传感器的响应时间缩短，恢复时间延长。高传感器响应和快速响应时间使铂功能化的氧化锌分支纳米线成为气体传感器的有前途的候选材料。本工作将有助于探索多组分纳米系统的新领域。
