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. 2017 Jun 8;7:3075. doi: 10.1038/s41598-017-03438-w

Figure 6.

Figure 6

Rama spectra of bulk hexagonal boron nitride powder (black) and the arc synthesized BNNTs (red). Only the E2g mode of hexagonal boron nitride was observed, and the blue shift observed in the synthesized BNNTs is characteristics of few-layer boron nitride.