Influence of Temperature on Evolution of Coaxial ZnO/Al2O3 One-Dimensional Heterostructures: From Core-Shell Nanowires to Spinel Nanotubes and Porous Nanowires
详细信息 查看全文
- 作者：Yang Yang ; Dong Sik Kim ; Mato Knez ; Roland Scholz ; Andreas Berger ; Eckhard Pippel ; Dietrich Hesse ; Ulrich Gö ; sele ; Margit Zacharias
- 刊名：Journal of Physical Chemistry C
- 出版年：2008
- 出版时间：March 20, 2008
- 年：2008
- 卷：112
- 期：11
- 页码：4068 - 4074
- 全文大小：1122K
- 年卷期：v.112,no.11(March 20, 2008)
- ISSN：1932-7455
文摘
In this paper, we present the influence of temperature on the Kirkendall effect-related evolution of coaxialZnO/Al2O3 one-dimensional heterostructures based on a solid-state reaction. Controllable fabrication of spinelZnAl2O4-based nanotubes and porous nanowires can step-by-step be achieved from ZnO/Al2O3 core-shellnanowires with a change in the reaction temperature. In particular, we demonstrate that the formation ofcompletely hollow nanotubes in this system is not strictly limited to a fixed stoichiometry of ZnO/Al2O3required for the spinel-forming reaction when an annealing temperature of 800 
C is employed. Combinedwith atomic layer deposition, the wall thickness of the formed nanotubes can be further precisely tailored anddefined. Our finding provides an effective route to fabricate spinel nanotubes as well as nanotube arrays ona large scale.
C is employed. Combinedwith atomic layer deposition, the wall thickness of the formed nanotubes can be further precisely tailored anddefined. Our finding provides an effective route to fabricate spinel nanotubes as well as nanotube arrays ona large scale.