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Porous NC materials. (a) Liquid-crystalline NC aerogel prepared by supercritical drying and (b) its scanning electron micrograph. Reprinted with permission from [47]. Copyright 2014 John Wiley and Sons. (c) and (d) Ultrahigh porosity foams with solid volume fractions of 0.32% and 1.04%, respectively. Reprinted with permission from [48]. Copyright 2016 Nature Publishing Group.
