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. 2021 Mar 22;3:636976. doi: 10.3389/ftox.2021.636976

Figure 1.

Figure 1

Schematic representation of the quantum dots (QDs) used in the present study. The following QDs were used: (i) QDs composed of an InZnP core coated with a gradient shell of ZnSexS1−x, i.e., Zn(Se,S) (grad QD), (ii) QDs having a double shell where the first shell is a Zn(Se,S) shell and the second shell is a thin outer ZnS shell (thin QD), and (iii) QDs having a double shell where the first shell is composed of Zn(Se,S) and the second shell is a thick ZnS shell (thick QD).