Fig. 3From: Boron nitride nanotubes: synthesis and applicationsReproduced with permission from [36], copyright 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserveda Experimental procedure of ball-millng method. b SEM and c TEM image of BNNTs produced by the ball-milling method. Cylindrical- and bamboo-like shape of BNNTs is shown in TEM image.Back to article page