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Normalized spectra of bare ZnO nanowires and nanowires embedded in PMMA. Two main features are visible: the deep-level emission (DLE) and the near band-edge emission (NBE). The DLE intensity of the embedded nanowires is strongly decreased. For a more detailed view of the NBE region (see Fig. 2).
Normalized near band-edge (NBE) spectra of bare ZnO nanowires and nanowires embedded in PMMA. The surface exciton becomes the dominating feature for the embedded ZnO nanowires.
Calculated geometry and measured NBE/DLE ratio for the different polymers studied in this work.
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