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Aerosol jet printed biological ink. A) Optomec Aerosol Jet 300 printer used in this work. B) Schematic representation of ultrasonic atomization Aerosol Jet Printing (u-AJP), with a magnified view of the printer head. C) Fluorescence images showing intensities for squares and circles of printed Cy-5 labelled BSA, captured under 647 nm light before (top) and after (bottom) sonication. D) Overspray ratio of the aerosol jet printed shapes as a function of printed feature size.
