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Characterization of PLGA hybrid scaffolds. (A) Schematic illustration of the 3D printing system for bicompartmental and monocompartmental scaffolds. (B) Representative SEM images of the hybrid scaffolds. (C) Fluorescence confocal microscopy images showing emission from blue and green labeled compartments. (D) SERS mapping of the signal from AuNS-BPT SERS tags, distributed throughout the PLGA fibers.
