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Extended Data Fig. 3 | Solidification and printing performance. a, The
evolution of solidification of the silica aerogel ink with and without PPGNH.
The gels are more transparent when PPGNH has been added to the sol,
indicative of a more homogenous pore structure. b, Filaments printed from
100-μm, 250-μm and 410-μm nozzles. c, Demonstrations of overhang and
bridging with ink SP2.5. d, Schematic designs of the 2D and 3D structures in
Fig. 1e: a lotus f lower (31–50 layers) and its leaf (24 layers). Models modified
from a design by J. Watkins, https://www.thingiverse.com/thing:415314.