Xu Lifen, Guo Yi, Liao Qing, Zhang Jianping, Xu Dongsheng
State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China.
J Phys Chem B. 2005 Jul 21;109(28):13519-22. doi: 10.1021/jp051007b.
We report here an electrodeposition route for the preparation of oriented and well-defined ZnO nanostructures by kinetically controlling the growth rates of various facets of the deposit by appropriate capping agents. We demonstrated that adsorption of Cl(-) takes places preferentially onto the (0001) planes to hinder the crystal growth along the c-axis, and results in the formation of platelet-like crystals. It is also shown that the morphology evolved from hexagonal tapers to hexagonal rods and rhombohedral rods by changing the compositions of the capping agents. Furthermore, strong UV emissions at 380 approximately 390 nm and negligible green bands at around 500 nm were observed, indicating that these ZnO electrodeposits are highly crystallized and of excellent optical quality.
我们在此报告一种电沉积方法，通过合适的封端剂动力学控制沉积物各晶面的生长速率，以制备取向良好且明确的ZnO纳米结构。我们证明了Cl(-)优先吸附在(0001)面上，从而阻碍沿c轴的晶体生长，并导致形成片状晶体。还表明通过改变封端剂的组成，形貌从六边形锥状演变为六边形棒状和菱面体棒状。此外，观察到在380至390nm处有强烈的紫外发射，而在500nm左右有可忽略不计的绿带，这表明这些ZnO电沉积物高度结晶且具有优异的光学质量。
