Inside Front Cover: Organic dye assemblies with aggregation‐induced photophysical changes and their bio‐applications

Photophysical property changes of organic dye can be realized by controlling their aggregation state. These changes result in red/blue shift of absorption/emission band, activation of phosphorescence, or photothermal/photodynamic effect (generating heat or ROS). Because of dye self-assembly in aqueous environment, the obtained nanoaggregates show great potential for optical diagnosis and therapy of cancer. (Aggregate. 2021;2:e39)