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. 2016 Aug 23;7:12553. doi: 10.1038/ncomms12553

Figure 4. EPR studies.

Figure 4

EPR spectra of ncSi:H samples (a) in N2 (red, at room temperature; pink, at 170 °C in dark; blue, at 170 °C with 0.5 sun); microwave frequency, 9.393 GHz, (b) in CO2 (red, at room temperature; pink, at 170 °C in dark for over half an hour; blue, at 170 °C with 0.5 sun for another half an hour); microwave frequency, 9.393 GHz.