Nanocrystalline order of zinc oxide thin films grown on optical fibers

Abstract

The crystallographic orientation of polycrystalline zinc oxide films grown on optical fibers using single-source chemical vapor deposition (SS CVD) of basic zinc acetate have been studied. The films have been characterized using near-edge x-ray absorption fine structure. For the SS CVD ZnO growth on planar substrates, the film orientation can be varied from randomly oriented to highly c-axis oriented. In contrast, the films grown on optical fibers were either randomly oriented or a,b-axis oriented, depending on growth conditions. The correlations between growth conditions and the crystallographic properties of the films on fibers were discussed. The results suggest that factors such as curva..