“…Due to bending instability, these jets are subsequently stretched to form continuous fibers, which are then collected on a receiving device, constituting a common technique for fabricating 1D materials (Figure 12a). 200 The preparation of BNNFs via electrospinning typically involves two procedures: initially mixing boron source with polymer and electrospinning the mixture into precursor fibers, followed by nitridation to form BNNFs. For instance, Qiu prepared a series of electrospinning precursor fibers by dissolving B 2 O 3 and polyvinyl butyral (PVB) at various concentrations in ethanol, followed by nitriding of mixture in NH 3 and N 2 atmospheres to obtain high-purity BNNFs.…”