Fluorescence 10 Photo-switchable 10 Photochromism 8 Semiconductor quantum dots 8 article 8 Amphiphilic polymers 6 Color 6 FRET 6 Imaging techniques 6 Switchable 6 chemistry 6 fluorescent dye 6 Animals 4 Aqueous medium 4 Biological specimens 4 Cell Line 4 Color channels 4 Far fields 4 Fluorescent Dyes 4 Functional imaging 4 Internal standards 4 Mammalian cells 4 Mammals 4 Microscopy 4 Molecular Structure 4 Molecular species 4 Molecular structure 4 Multicolor imaging 4 Nanoparticles 4 New class 4