Flower-like bundles of ZnO nanosheets as an intermediate between hollow nanosphere and nanoparticles

In a hydrothermal route developed for synthesis of ZnO nanostructures, morphology can be controlled by experimental condition to form hollow nanospheres or nanostructured nanoparticles. In an intermediate condition, a novel nanostructure, namely flower-like bundle of ZnO nanosheets was found, which is different from known ZnO nanostructures.