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(a) Image of a dried CNC microparticle, as imaged in transmission (left) and under cross-polarizers with a first-order tint plate (right). (b–d) SEM images of a dry, buckled CNC microparticle, showing (c) the clear ordering of cellulose nanocrystals on the surface and (d) the helicoidal assembly of CNC with a defined pitch, p, within the particle.
