Fig. 6.

a TEM image of Pd NCs grown on an MoS₂ nanosheet. b Selected-area electron diffraction (SAED) pattern of Pd-MoS₂ epitaxial heterostructures with the electron beam perpendicular to the basal plane of the MoS₂ nanosheet. c HRTEM image of Pd NCs on MoS₂, showing distinguishable lattice fringes of Pd and MoS₂. Inset: photograph of the Pd-MoS₂ solution. d TEM image of Pt NCs grown on an MoS₂ nanosheet. e SAED pattern of Pt-MoS₂ epitaxial heterostructures with the electron beam perpendicular to the basal plane of the MoS₂ nanosheet. f HRTEM image of Pt NCs on MoS₂ showing distinguishable lattice fringes of Pt and MoS₂. Reproduced with permission from Ref. [24]. Copyright 2013, Nature Publishing Group. g TEM image and schematic illustration of lateral 2D heterostructures consisting of Bi₂Se₃ nanoplates and CdS NCs. h HRTEM image of the Bi₂Se₃-CdS interface, viewed along the [001] axes. i TEM image and schematic illustration of basal Bi₂Se₃-CdS heterostructures. Reproduced with permission from Ref. [140]. Copyright 2015, American Chemical Society