Compared was recorded for BNNTs at 10

Compared to their carbon counterparts, BNNTs show many
unique electronic properties. For instance, BNNTs are
uniformly semiconductors with a wide band gap regardless of
their chirality or diameter 4, in contrast to carbon nanotubes
(CNTs), which exhibit diversified metallic and semiconducting
characteristics. Experimentally, Ma et al. 19 a 1.8 wt.% hydrogen uptake was recorded for BNNTs at 10 MPa, and the bamboo-structured BN fibers had a 2.6 wt.% hydrogen capacity. Tang et al. 179 synthesized BNNTs with collapsed structures; they reported that the collapsed BNNTs could store hydrogen up to 4.2 wt. % at room temperature. Boron nitride nanotube (BNNT), which firstly predicted and synthesized by Rubio and Chopra respectively6, has a structural analogy to CNT but, contrary to the CNT being metallic (semiconductor) depending on chirality.

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