Synthesis of vertically aligned flower-like morphologies of BNNTs with the help of nucleation sites in Co–Ni alloy

A Co–Ni alloy deposited at the top of Si substrate produces nucleation sites when etches with ammonia. The as-produced nucleation sites are used as a pattern to grow flower-like morphologies of vertically aligned Boron nitride nanotubes (BNNTs) in the present study. HR-TEM micrographs show black-blur like morphology on the outer part of the BNNTs. The sample contains BNNTs with and without internal bamboo like structures. XPS survey shows B 1s and N 1s peaks at ~191 eV and ~398 eV that indicate the presence of Boron and Nitrogen components in the synthesized sample. Raman spectrum shows a major peak at 1370 cm−1 that corresponds to E2g mode of h-BN. The as-synthesized BNNTs can be used for its potential applications without any further purification.