Understanding the Influence of Vacancies Diffusion in Utilizing the Kirkendall Phenomenon for Nanotubes Formation
Formation of metal oxide nanotubes by Kirkendall effect 1 through oxidation of the metal nanowire has been frequently reported for nanotubes of FeO, ZnO, AlO and CuO. One important material is nickel oxide (NiO) as it has desirable properties for use in gas sensing, non-volatile resistive switching memories and dye sensitized photocathodes 2, 3, 4. Unfortunately, oxidation of Ni appears to be tricky and unique. Recently, attempts to oxidize Ni nanowires yields bamboo-like structures with separated voids and irregular diameters as opposed to the formation of uniformly thick walls that is common for CuO, FeO etc. 5 Understanding the oxidation behaviour of Ni nanowires is therefore important in aiding to understand the factors that influence the Kirkendall effect. In doing so, uniform NiO nanotubes that is important for reliability and reproducibility can possibly be produced.
Y.Ren W.K.Chim S.Y.Chiam
NUS Graduate School for Integrative Sciences and Engineering 28 Medical Drive 117456, Singapore Institute of Materials Research and Engineering, A*STAR 3 Research Link 117602, Singapore
国际会议
2010 8th International Vacuum Electron Sources Conference and NANOcarbon(第八届真空电子源和纳米碳国际会议)
南京
英文
415-416
2010-10-14（万方平台首次上网日期，不代表论文的发表时间）