Fig. 2: Colloidal hydrogel fabrication using the sacrificial scaffold. | Nature Communications

Fig. 2: Colloidal hydrogel fabrication using the sacrificial scaffold.

From: 3D printing colloidal crystal microstructures via sacrificial-scaffold-mediated two-photon lithography

Fig. 2

a Chemical structure of the reagents used. b Optical and SEM images of the (i) sacrificial scaffold, (ii) secondary polymerized hydrogel, and (iii) hydrogel after degradation. Scale bars: 2 mm for optical images and 500 nm for SEM images. c Normalized reflection spectra of the hydrogels in b. d Raman spectrum of the PEGDA hydrogel (fabricated without sacrificial scaffold), and the hydrogels in b. e Schematic demonstration of the formation of patterned PEGDA colloidal crystal hydrogel using a sacrificial scaffold, and the photo of the hydrogels obtained during the fabrication process. Scale bars: 5 mm.

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