Fabrication of inverse opal beads based on biocompatible and biodegradable polymer

Photonic crystals have been widely used in various fields, however, it is still challenging to employ photonic crystals for in vivo application due to the poor biocompatible and biodegradable properties. In this work, we fabricated inverse opal beads based on biocompatible and biodegradable chitosan. Not only these chitosan-based inverse opal beads exhibited hollow structure together with a uniform interconnected pore structure, but also showed excellent Bragg diffraction in the near-infrared region. These polysaccharide-based inverse opal beads have attractive applications in bio-imaging, drug delivery and so on.

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