Short Communication Electrodeposition Synthesis of Au-Cu Heterojunction Nanowires and Their Optical Properties

Au-Cu heterojunction nanowires with different diameters were fabricated with assistance of the anodic alumina oxide (AAO) template by electrochemical deposition. The as-prepared nanowires were characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectrometer (EDS) and reflected laser confocal imaging. Optical properties of the Au-Cu heterojunction nanowires were studied. In UV-visible absorption spectra, Au-Cu heterojunction nanowires exhibit enhanced absorption compared with single Au and Cu nanowires, and the absorption bands are broadening and red shifted, which are attributed to the electron transfer between Au and Cu segments