Understanding the role of 'path' for sacrificial substance migration during the fabrication of hollow nanostructures in PtPdCu system
Understanding the role of 'path' for sacrificial substance migration during the fabrication of hollow nanostructures in PtPdCu system
复制标题
了解 PtPdCu 系统中空心纳米结构制造过程中牺牲物质迁移“路径”的作用
DOI：
10.1088/2053-1591/2/8/085008
复制
发表时间：
2015-08-01
影响因子：
2.3
通讯作者：
Wang, Yizhi
中科院分区：
文献类型：
--
作者：
Gong, Hongyu;Li, Fan;Wang, Yizhi
PtPdCu nanoparticles (NPs) were etched by acid to prepare hollow nanostructures (HNSs). A hypothesis 'path' was given. The rate of Cu migration is different in amorphous and in crystalline structures, and is usually faster in amorphous structures. The fast mass transport part looked like a road for Cu migration, and it was named the 'path'. With time passing, phase transfer occurs; the 'path' may shrink until it is closed. These changes of the status of the 'path' would affect the results of the Kirkendall effect, separate voids or big holes inside particles. This could indicate that only a 10 K temperature difference in the synthesis results in the final productivity of the HNSs, and even the morphologies, being different during the same leaching process. High resolution electron microscopy images obtained during the leaching process gave evidence of a glass-like region and a crystal region coexisting, which was evidence of the 'path' formed.
