Fig. 4From: A novel and cost-effective method for high-throughput 3D culturing and rhythmic assessment of hiPSC-derived cardiomyocytes using retroreflective Janus microparticlesCharacterization of RJPs. (a) SEM images of RJPs; (b) Fluorescence microscopy images of ab-conjugated RJP and control-RJPs after the labeling with Alexa fluor 488. Fluorescence signal was not observed in control-RJPs and large amounts of fluorescence signals were observed for ab-conjugated RJPBack to article page