Tuning of Photoluminescence and Antibacterial Properties of ZnO Nanoparticles through Sr Doping for Biomedical Applications

Figure 2

(a–d) FESEM images of pure and Sr-doped ZnO nanoparticles: (a) undoped, (b) 3 at.%, (c) 5 at.%, and (d) 7 at.%.

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(b)

(c)

(d)