Figure 4.

Comparison of the PL spectra of ZnO NWs grown on GO films and glass substrate. (a) Visible emissions of the ZnO NWs/GO films. (b) A schematic diagram of the electron transfer between ZnO NWs and GO films.

Zeng et al. Nanoscale Research Letters 2013 8:133   doi:10.1186/1556-276X-8-133
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