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a) Epi-fluorescence microscopy image of the electron-beam written nanoarray functionalized with Alexa488-labeled streptavidins (100 ms exposure time); b) Epi-fluorescence microscopy image of the nanoarray functionalized with Rhodamine Red-labeled dsDNAs (100 ms exposure time); the insets at the top right-hand corners of (a) and (b) show a zoomed fluorescence image of the array.
