Fig. 5: NGQDs and their role in rendering the core-shell microspheres luminescent. | Microsystems & Nanoengineering

Fig. 5: NGQDs and their role in rendering the core-shell microspheres luminescent.

From: One-step generation of luminescent core-shell microspheres for cell encapsulation via pulsed operation in centrifugal microfluidics

Fig. 5

a HRTEM image of the synthesized NGQDs. The regions with decipherable lattice fringes are marked as a guide to the eyes. b The size distribution histogram constructed from several TEM images. c BF (left panels) and fluorescence (right panels) optical microscopy images of the core-shell structures: (i) without NGQDs and (ii) with NGQDs encapsulation. d The UV-visible absorption characteristics of pristine NGQDs, chitosan-alginate core-shell structures and the core-shell structures with embedded NGQDs. e The PL emission from NGQDs, chitosan-alginate, NGQDs encapsulated chitosan-alginate core-shell structures. f Photographs of CS solution samples without and with NGQDs under ambient light (left) and under UV excitation (right) exhibiting intense PL from the NGQDs incorporated samples that are visible with the naked eyes. Scale bars in the optical micrographs are 500 µm

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