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Single-layer coating of 20 μm negatively charged polsytyrene particles and HeLa cells. (a) The particles and the cells are vertically deflected through a fluorescenlty labeled positively charged PAH solution. (b) After removing the background fluorescene intensity of the PAH stream, coated polystyrene particles are seen leaving the stream. (c) The particles and (d) HeLa cells collected from the the collection outlet show conformal coating through fluorescene imaging.
