LAUSR

Abstract Stimuli-responsive polymers-based two-dimensional photonic crystals (2DPCs) are comprised of two main components, stimuli-responsive hydrogels and structured microparticles. Microparticles can self-assemble into ordered structures in two dimensional spacing on the surface of hydrogels. The ordered structure allows structural colors that can be used as indicator phenomena to detect various analytes. The changes in colors are associated with the concentration change of analytes. Therefore, the concentration of the analytes can be determined using a simple colorimetric comparison. 2DPCs have attracted much attention due to their sensing applications. This article covers a brief general introduction of 2DPC and highlights many milestone examples as biosensors to inspire more innovative research work in the near future.