Anion-controlled construction of CuO honeycombs and flowerlike assemblies on copper foils

In this paper, novel honeycomb- and flowerlike CuO nanoarchitectures assembled from nanowires and nanoribbons were successively prepared on copper foils by an anion-controlled mild hydrothermal method. A series of control experiments confirm that the concentration of inorganic anions, the concentration of surfactant, and the kind of inorganic anions have direct influences on the morphology of the products. On the basis of these experimental results, possible influence mechanisms in the growth processes are proposed.