Fig. 2

Characterization of amino-functionalized ZnO NCs. a Transmission electron microscopy (scale bar: 50 nm). b X-ray diffractogram (*: peaks of Si-wafer). c Dynamic Light Scattering measurements of ZnO NCs dispersed in ethanol (black line), bd water (red line) and physiological solution (blue line). Results are representative over a broad number (n > 10) of ZnO NCs syntheses and functionalization batches