Figure 7.
The zeta potential of as-prepared samples at pH =7.0: (a) naked Fe 3 O 4 NPs, (b) CS-coated Fe 3 O 4 NPs, (c) CdTe-CS-coated Fe 3 O 4 NPs, and (d) Fe 3 O 4 -CdTe@SiO 2 -NH 2 NPs.
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