Fractal dimension and photoluminescence of ZnO tetrapod nanowhiskers

Wu R; Yang Y; Cong S; Wu ZG; Xie CS; Usui H; Kawaguchi K; Koshizaki N

Chemical Physics Letters, Vol.406, No.4-6, 457-461, 2005

DOI10.1016/j.cplett.2005.03.030 Export Citation

Fractal dimension and photoluminescence of ZnO tetrapod nanowhiskers

Wu R, Yang Y, Cong S, Wu ZG, Xie CS, Usui H, Kawaguchi K, Koshizaki N

ZnO tetrapod nanowhiskers were prepared and characterized using fractal dimension analysis. The fractal dimension of well-developed ZnO nanowhiskers was higher than 1.7, while that of ZnO nanoparticles was lower than 1.6. In addition to UV band-edge emission, nanowhiskers of large fractal dimension having well-developed ZnO crystalline feet and a Zn phase at the tetrapod center exhibited two visible emissions at wavelengths of 419 and 438 nm at room temperature. (c) 2005 Elsevier B.V. All rights reserved.