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(a) Fluorescence image of 200 droplets (20 nL) of aqueous R6G (10−7 M) solution dispensed by the inkjet printer. (b) Fluorescence spectra from diatoms of different amounts of an aqueous solution of R6G dispensed onto the photonic crystal biosilica by inkjet printing and pipette. (c) Comparison of fluorescence spectra of the R6G (10−6 M) dispensed onto the photonic crystal biosilica and the glass substrate by inkjet printing and pipette.
