Figure 1.

Raman spectra of pure ZnO samples under different synthesis conditions. Samples ZnO.Com, ZnO.Et, ZnO, and ZnO.Et.Cal. Sample ZnO (dry milled) has very different behavior than the rest of the samples; additional peaks are attributed to Zni impurity complexes.

Olive-Méndez et al. Nanoscale Research Letters 2014 9:169   doi:10.1186/1556-276X-9-169
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