Fig. 3: 3D printed structures derived from BCP-niobia sol with periodic atomic, mesoscale, and macroscopic lattices.
From: Hierarchically ordered porous transition metal compounds from one-pot type 3D printing approaches
a–c Photos of as-printed periodic cubic woodpile of Pluronic F127-niobia sol hybrid. d, g Photos of resulting oxide (d) and nitride (g) woodpiles after heat treatment in the furnace under various gas environments. e, f, h, i Scanning electron microscopy (SEM) micrographs at different magnifications of periodic hexagonal mesostructures of oxide (e, f) and nitride (h, i). j, k Optical micrographs of oxide woodpile in (d). l Photos of as-printed cylindrical woodpile of Pluronic F127-niobia sol hybrid. Blue (a–c) and orange (l) colors are from methylene blue and Sudan I dyes dissolved in the ink, respectively. Pore sizes of the woodpile lattices shown in (a–c) and (l) vary between 240 and 1000 μm.
