Figure 5.

XRD patterns. XRD patterns of (i) B powder milled alone, (ii) B powder milled with Fe(NO3)3, (iii) as-purchased Fe(NO3)3•9H2O and (iv) BNNTs produced by the improved ball milling method.

Li et al. Nanoscale Research Letters 2012 7:417   doi:10.1186/1556-276X-7-417
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