Lee et al. have shown that the solubility
of the pristine BNNTs may increase by their functionalization
with methoxy-poly(ethylene glycol)-1,2-distearoyl-sn-glycero-3-
phosphoethanolamine-N conjugates [22]. However, altering the
surface chemistry of the BNNTs is still in its early stages and effective
surface functionalization has remained a challenging task.