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(Color online) (a) SEM image of as-fabricated ZnO bicrystal NWs. (b) TEM image of a single bicrystal ZnO nanowire. (c) SAED pattern of the bicrystal NW. (d) HRTEM shows atomic lattices and lattice distortion indicated by the oval.
RT curve and curve (inset) for Bi–Cu codoped ZnO bicrystal NWs on an oxidized Si substrate.
(Color online) XRD pattern of bicrystal NWs. The inset is the (002) peaks from Bi–Cu bicrystal NWs and Bi–ZnO NWs. The (002) peak of bicrystal NWs has an angle shift of toward a lower angle as compared to Bi–ZnO NWs.
(Color online) PL spectra of bicrystal BiCu–ZnO NWs at (a) and (c) as well as single crystal Bi–ZnO NWs at (b). The wavelength of the excitation source is .
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