Shape Control in Epitaxial Electrodeposition: Cu₂O Nanocubes on InP(001)
Epitaxial cuprous oxide, Cu₂O, nanocrystals are deposited electrochemically onto n-InP(001). The lattice of the Cu₂O is rotated 45° around the common  axis normal to the substrate plane. The shape of the Cu₂O nanocrystals depends on the pH of the solution. Nanopyramids form at pH 9, and nanocubes form at pH 12.
R. Liu et al., "Shape Control in Epitaxial Electrodeposition: Cu₂O Nanocubes on InP(001)," Chemistry of Materials, American Chemical Society (ACS), Jan 2003.
The definitive version is available at http://dx.doi.org/10.1021/cm034807c
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