Characterization of exfoliated, modified, structured and aligned BNNS. (a) SEM image of BNNS powder before stripping;(b) SEM image of BNNS powder after exfoliation; (c) XRD patterns of BNNS before and after exfoliation; (d) TEM image of BNNS powder after exfoliation (inset: crystal diffraction pattern); (e) AFM image of BNNS powder after exfoliation (inset: sample thickness); (f) SEM and EDS spectra of magnetized m-BNNS; SEM images of the (g) front and (h) top (microcolumn section) of the m-BNNS/PDMS composite membrane; (i) Raman spectra of m-BNNS/PDMS composite films after magnetic-field-orientation.