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. 2016 Sep 29;6:34474. doi: 10.1038/srep34474

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Copyright © 2016, The Author(s)

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(a) C 1s, (b) B 1s and (c) N 1s XPS spectra of BN grown on HOPG for 3 hours. Note the broad peaks at ~7 eV and ~9 eV from the main peaks in (a,b), respectively. (d) Offset Raman spectra of BN grown on HOPG for 24 hours measured at two different excitation wavelengths. Each spectrum is deconvolved into two Gaussian peaks. Note that the position of the peak assigned to BN (~1370 cm⁻¹) is non-dispersive contrary to the D peak. (e) Optical absorption coefficient, , of the BN grown for 3 hours derived from the analysis of spectroscopic ellipsometry measurements. The grey line is used to determine the onset energy of the optical bandgap. Inset of vs. photon energy demonstrates there is no significant absorption in the layer below 5.6 eV.

Inline graphic — (a) C 1s, (b) B 1s and (c) N 1s XPS spectra of BN grown on HOPG for 3 hours. Note the broad peaks at ~7 eV and ~9 eV from the main peaks in (a,b), respectively. (d) Offset Raman spectra of BN grown on HOPG for 24 hours measured at two different excitation wavelengths. Each spectrum is deconvolved into two Gaussian peaks. Note that the position of the peak assigned to BN (~1370 cm⁻¹) is non-dispersive contrary to the D peak. (e) Optical absorption coefficient, , of the BN grown for 3 hours derived from the analysis of spectroscopic ellipsometry measurements. The grey line is used to determine the onset energy of the optical bandgap. Inset of vs. photon energy demonstrates there is no significant absorption in the layer below 5.6 eV.