The article reports on a very simple method to fabricate superhydrophobic surfaces with Cu-Zn alloy via changing the local oxygen concentration and formation of oxygen difference cell, which can be readily realized by covering or contacting the Cu-Zn alloy surface with a glass slide. This superhydrophobic film comes from the formation of a flower-like hierarchical Structure due to the accelerated alloy etching. contrast, the white film grown in the un-covered area showed a Much lower hydrophobicity due In. to its different morphology. These superhydrophobic surfaces OF superhydrophobic-hydrophobic surfaces are expected to find applications in making self-cleaning alloy surface, in metal anticorrosion, and in biomineralization, etc. (C) 2008 Elsevier Inc. All rights reserved.