... Lia, Difa XubaDepartment of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410114, ChinabDepartment of Science and Technology, Changsha University, ... pattern (a) and UV–visible optical absorption characteristics (b) of the sea urchin-like ZnO nanostructures.Fig. 2. SEM images (a,b), TEM image (c), HRTEM image (d) and SAED pattern (e) of the sea ... UV–visible optical absorption and photocurrent–voltage measurements. The results demonstrated that the ZnO crystals had hexagonalwurtzite structures, and were assembled by a central nucleus and many...