Figure 4

(a) TEM image of a Cu nanowire. The inset indicates the diffraction patterns around the center of the nanowire. (b,c) Results of the electron energy loss spectroscopy analysis around the center of the Cu nanowire: (b) measured from the nanowire and (c) measured from the pure Cu sample. (d) Cu and (e) O₂ mapping around the center of the nanowire.