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Confocal laser scanning microscopy images of LbL-grown nanotubes (a) and the resulting nanocapsules (b) constituted of (PSS/PAH)8PAH assemblies after hydrothermal treatment at 121 °C. Images were taken in water and PAH was labeled with fluorescein isothiocyanate to facilitate the visualization of the nanostructures. Reproduced and adapted with permission from He et al. Langmuir, 2008, 24, 5508. Copyright 2008 American Chemical Society.
