Crystallization of Amorphous SiO2 Microtubes Catalyzed by Lithium (pages 1952–1957)
L. Zhao, N. Li, A. Langner, M. Steinhart, T. Y. Tan, E. Pippel, H. Hofmeister, K.-N. Tu and U. Gösele
Article first published online: 10 JUL 2007 | DOI: 10.1002/adfm.200601104
Crystalline silica microtubes consisting of single-crystalline segments (see figure) are obtained by using thermal oxidation coupled with lithium-induced crystallization of macroporous silicon. The Li was transported through the gas phase. This Li-induced crystallization of SiO2 allows the integration of quartz and cristobalite layers into microstructured Si building blocks.