World Premier International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science, Namiki 1-1, Tsukuba, Ibaraki, 305-004, Japan.
Nanoscale Res Lett. 2010 Feb 10;5(4):773-80. doi: 10.1007/s11671-010-9556-7.
Vertically aligned Zn2SiO4-SiOx(x < 2) core-shell nanotube arrays consisting of Zn2SiO4-nanoparticle chains encapsulated into SiOx nanotubes and SiOx-coated Zn2SiO4 coaxial nanotubes were synthesized via one-step thermal annealing process using ZnO nanowire (ZNW) arrays as templates. The appearance of different nanotube morphologies was due to size-dependent thermal instability and specific melting of ZNWs. With an increase in ZNW diameter, the formation mechanism changed from decomposition of "etching" to Rayleigh instability and then to Kirkendall effect, consequently resulting in polycrystalline Zn2SiO4-SiOx coaxial nanotubes, single-crystalline Zn2SiO4-nanoparticle-chain-embedded SiOx nanotubes, and single-crystalline Zn2SiO4-SiOx coaxial nanotubes. The difference in spatially resolved optical properties related to a particular morphology was efficiently documented by means of cathodoluminescence (CL) spectroscopy using a middle-ultraviolet emission at 310 nm from the Zn2SiO4 phase.
垂直排列的 Zn2SiO4-SiOx（x < 2）核壳纳米管阵列由包裹在 SiOx 纳米管中的 Zn2SiO4-纳米粒子链和 SiOx 涂层的 Zn2SiO4 同轴纳米管组成，通过一步热退火工艺合成，使用 ZnO 纳米线（ZNW）阵列作为模板。不同纳米管形态的出现是由于尺寸相关的热不稳定性和 ZNW 的特定熔化。随着 ZNW 直径的增加，形成机制从“蚀刻”的分解变为瑞利不稳定性，然后变为 Kirkendall 效应，从而导致多晶 Zn2SiO4-SiOx 同轴纳米管、单晶 Zn2SiO4-纳米链嵌入 SiOx 纳米管和单晶 Zn2SiO4-SiOx 同轴纳米管。通过使用来自 Zn2SiO4 相的 310nm 中紫外发射的阴极发光（CL）光谱，有效地记录了与特定形态相关的空间分辨光学性质的差异。
Zotero 插件
