School of Materials Science and Engineering, Inha University, Incheon, Republic of Korea.
Nanotechnology. 2011 Jun 3;22(22):225501. doi: 10.1088/0957-4484/22/22/225501. Epub 2011 Apr 1.
γ-ray radiolysis is applied to synthesizing Pd nanodots on networked SnO(2) nanowires. The growth behavior of Pd nanodots is systematically investigated as a function of the precursor concentration, illumination intensity, and exposure time of the γ-rays. These factors greatly influence the growth behavior of the Pd nanodots. Selectively grown networked SnO(2) nanowires are uniformly functionalized with Pd nanodots by the radiolysis process. The NO(2) sensing characteristics of the Pd-functionalized SnO(2) nanowires are compared with those of bare SnO(2) nanowires. The results indicate that γ-ray radiolysis is an attractive means of functionalizing the surface of oxide nanowires with catalytic Pd nanodots. Moreover, the Pd-functionalization greatly enhances the sensitivity and response time in SnO(2) nanowire-based gas sensors.
γ-射线辐射解应用于在网络化的 SnO(2)纳米线上合成 Pd 纳米点。作为前驱体浓度、光照强度和 γ-射线照射时间的函数，系统地研究了 Pd 纳米点的生长行为。这些因素极大地影响了 Pd 纳米点的生长行为。通过辐射解过程，选择性生长的网络化 SnO(2)纳米线被均匀地功能化上 Pd 纳米点。比较了 Pd 功能化的 SnO(2)纳米线与裸 SnO(2)纳米线的 NO(2)传感特性。结果表明，γ-射线辐射解是用催化 Pd 纳米点功能化氧化物纳米线表面的一种有吸引力的方法。此外，Pd 功能化极大地提高了基于 SnO(2)纳米线的气体传感器的灵敏度和响应时间。
