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CdS nanowire arrays were synthesized by altering current(AC)electrodeposition in the porous anodic alumina film prepared by aluminium anodizing in oxalic acid.These nanowires have a uniform diameter of about 45 nm corresponding to the pore size of the films used and length up to several microns.The X-ray diffraction(XRD)patt indicates that the CdS nanowires crystallize in an hcp structure.Besides,photoluminescences(PL)of CdS nanowire arrays,characterized by spectrophotometer show that CdS nanowries embedded in porous alumina template increases the light-emitting intensity and induces a red shift of PL band.