Thanks to the high quality and resolution of the images observed, we were able to size individual rods of CNCs (Fig 8). 1000 single rods were counted for never-dried CNCs at pH 3.5 on a carbon grid. We measured them to be 9.7 ± 4.4 nm in width and 216 ± 82 nm in length, consistent with reported values (Habibi, et al. 2010).