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. Author manuscript; available in PMC: 2015 Sep 8.
Published in final edited form as: Nanotechnol Rev. 2012 Mar;1(2):111–146. doi: 10.1515/ntrev-2011-0005

Figure 10.

Figure 10

Semiconductor nanoparticles.

(A) Semiconductors such as ZnO will form electron-hole pairs upon absorption of UVA or blue photons, and these electrons can be transferred to oxygen-forming superoxide that leads to further ROS. (B) Typical QD with CdSe core, followed by a zinc sulfide capping passivation layer covered by a biologically compatible layer made of thiol containing compounds. PS are covalently attached to the QD that can take part in FRET with the emission of the QD being used to excite the PS.