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Growth and optical properties of quadrangular zinc oxide nanorods on copper-filled porous silicon

Research paper by K. Yu, Y. Zhang, L. Luo, W. Wang, Z. Zhu, J. Wang, Y. Cui, H. Ma, W. Lu

Indexed on: 01 Aug '04Published on: 01 Aug '04Published in: Applied Physics A



Abstract

Zinc oxide (ZnO) nanorods with quadrangular morphology have been successfully prepared on a copper-filled porous silicon substrate using a vapor phase transport method. Scanning electron microscopy showed that the diameters of the nanorods were scattered in a range of 100–400 nm and the lengths up to 2 μm. High-resolution transmission electron microscopy and a selected-area electron-diffraction pattern confirmed that the quadrangular ZnO nanorods had a single-crystal wurtzite structure and grew along the (0001) direction. The photoluminescence spectrum under excitation at 325 nm showed an ultraviolet emission at 386 nm and a strong broad green emission at 518 nm at room temperature.