Fig. 1.

Preparation of multi-compartmental hydrogel particles using microfluidics. a The bright-field image of polyethylene glycol (PEG) multi-compartmental hydrogel particles was recorded. b The bright-field image of a single particle was recorded to observe its details. c The cores of the PEG multi-compartmental hydrogel particles were labeled with Albumin-FITC, showing green florescence signal with emission wavelength 520 nm. d The image of a single particle, whose core was labeled by Albumin-FITC was recorded. e The shells of the PEG multi-compartmental hydrogel particles were labeled with Dextran-RhB, showing red florescence signal with emission wavelength 590 nm. f The image of a single particle, whose shell was labeled by Dextran-RhB was recorded. g The image of a particle with core labeled with Albumin-FITC (green fluorescence) and shell labeled with Dextran-RhB (red fluorescence) was recorded. Scaling bars are 200 μm