Résumé
ZnO crystals can be grown from alkaline hydrous solutions at temperatures between 100 oC and 200 oC. Here, the driving force is obviously an increase in temperature, leading to the destruction of soluble complex Zn containing cations. Without the presence of a substrate, ZnO nanocrystals in a great morphological variety are grown. The presence of an almost lattice-matched substrate leads to the preferred deposition of ZnO on this substrate. ZnO nanorods that are mostly aligned parallel, but also agglomerates of such nanocrystals are grown. Under optimum conditions even epitaxial layers of ZnO can be obtained.