Fig. 8.

a Schematic illustration of the synthesis of core@shell and core-crown structures from 2D seeds. b HAADF image of annealed CdSe@CdS core@shell nanoplates with very smooth surfaces. c High-resolution HAADF image of a CdSe@CdS core@shell nanoplate on the side exhibiting the core@shell structure and five Cd planes of the initial CdSe nanoplate. Reproduced with permission from Ref. [146]. Copyright 2012, American Chemical Society. d TEM image of CdSe-CdS core-crown heterostructures. e HAADF-STEM image and f color-coded STEM EDS map of CdSe-CdS core-crown heterostructures. The red, green, and blue colors represent to S, Se, and Cd, respectively. Reproduced with permission from Ref. [151]. Copyright 2013, American Chemical Society