Figure 6From: Facile synthesis of folate-conjugated magnetic/fluorescent bifunctional microspheres The hydrodynamic diameter of as-prepared samples at pH =7.0: (a) naked Fe 3 O 4 , (b) CS-coated Fe 3 O 4 , (c) CdTe-CS-coated Fe 3 O 4 , and (d) Fe 3 O 4 -CdTe@SiO 2 -NH 2 . Back to article page