Comparison of nitrogen K-edge NEXAFS spectra of an as-grown bamboo-like BNNT, recorded in PEY, and TEY modes. Both spectra are characterised by π* (P1, P2) and σ* (P3–P6) resonances.
Nitrogen K-edge NEXAFS spectra recorded in three different modes and taken simultaneously from a BNNT sample after bombardment with 2 keV N2 + ions for 4 min. Fine structure around the top of π* resonances at around 401 eV is resolved in both PEY and TEY spectra.
High-resolution NEXAFS of N (1s) π* peak of samples bombarded with 2 keV N2 + ions for 2 and 4 min.
Vibrationally resolved NEXAFS data (closed circles) from Fig. 3 for 4 min bombardment, fitted with three sets of Voigt profiles, a, b, and c, for 2Σ−, 2Δ− and 2Σ+ states, respectively.
N 1s core-level photoemission spectra (closed circles) obtained from an as-grown BNNT and the same sample after bombardment with 2 keV N2 + ions for 4 min. Solid lines are a numerical fit of experimental curves with a convolution of Lorentzians and Gaussians.
Vibrationally resolved NEXAFS data from molecular nitrogen (closed circles) in ion-bombarded BNNT (2 keV N2 + for 4 min), measured across the TEY resonance P1 from Fig. 2 . Solid lines represent fitting using Voigt profiles.
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