Using photo-actuated unimolecular logical switching attained reconstruction (PULSAR) nanoscopy, the structures of photoswitchable polymeric nanoparticles self-assembled on the surfaces of CaCl(2) crystals at the nanoscale were revealed; the photoswitching events and the locations of the photoswitchable fluorescent dyes inside the hydrophobic cores of the core-shell type polymeric nanoparticles were determined.
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