SEM images of various cross-sectioned composite panels showing the location of CNTs within the polymer matrix. CNTs are seen as bright regions within the matrix. Panels with MWCNT spray-coated fibers (a) show greater migration into matrix and extend through to the panel surface. Panels with spun MWCNTs (b) and laser SWCNT sprayed carbon fiber fabrics (c) show lower migration and remain in closer proximity to the fibers. Panels with SWCNTs directly dispersed into the resin during fabrication show mixed behavior with the SWCNTs aggregating within the matrix (d).
